A wonderfully versatile power, which gives Dragonborn a round in which they can make two attacks, along with an automatic AOE (area of effect) attack. This power can be upgraded through feats as well. The damage type can be rather important:

Fire: If you want your Dragon Breath to deal as much damage as possible in Paragon and Epic tiers, then you might want to go for fire breath. Just be aware that fire is among the most resisted damage types there is.

Cold: If you enjoy the Wintertouched + Lasting Frost combination, this helps it along. In Paragon and Epic tiers, you can also use your breath to inhibit enemy movements. Dragonborn Warlocks who have the Rod of the Dragonborn can also make all their spells cold, which helps the combo work for them too. Overall, a nice element to have.

Acid: There's nothing inherently good or bad about Acid, and not many creatures resist it. If you want an attack that can debilitate enemy defenses in Paragon and Epic tiers, then go with this. 

Lightning: With the Oncoming Storm feat released in the PHBII, you can now give your Thunder powers some extra accuracy by firing off a Dragon Breath at the enemy before unleashing them. The fact that Lightning resistance is rather rare also helps this element out. Lightning breath can add an element of control to your breath attack in Paragon and Epic tiers.

Poison: Poison is a fairly common resistance, and although there are a few feats that help you get around that, there's really no feats that enhance the element itself. If you want to weaken foes hit by your breath attack in Paragon and Epic tiers, then you might want to opt for poisonous breath.

Some Dragonborn never end up developing a Breath Weapon. While this may seem very odd at first, they make up for this deficiency in other ways. These Dragonborn best embody the concept of a Dragon's intimidating presence; their Dragonfear power causes opponents powers to miss more often, and forces them to grant combat advantage to them.

Both Dragon Breath and Dragonfear are nice powers, but you can only have one. So which one? It largely depends on what class you choose, but there are a few clues to help you decide:
– Does your class use a physical stat? While there is indeed the powerful breath feat, you may just want to stick with Dragonfear and save yourself a feat slot.
– Does your class have power-specific feat support? Dragonborn Paladins will almost universally want Dragon Breath for the Draconic Sanction feat, while Dragonborn Wardens might be better served by Dragonfear and the Draconic Guardian feat.
– Does your class enjoy a lot of fear support? Thaneborn Barbarians and Star Pact Warlocks might like the Dragonfear option simply because it has nice fear backing.

Arcane Blood: This feature replaces Dragonborn Fury, and provides a scaling damage bonus to arcane powers. While attack bonuses tend to be better than damage bonuses, this bonus can be used all the time, rather than just when you're bloody. I'd call it a wash, since the classes that would most enjoy this bonus (Sorcerers and Warlocks) tend to have fewer surges, and thus prefer not to be bloodied.

Instinctive Flight: This feature replaces Draconic Heritage, and lets you fly 6 squares as long as you land at the end of your turn. This can be helpful for a variety of classes, since you can bypass difficult terrain almost entirely. It's definitely worth taking if your Constitution isn't that great, and worth thinking about even if it is.

Concussive Vengeance: This feature replaces Dragon Breath, and provides you with a close burst daily attack power. The power deals damage equal to your bloodied value to enemies you hit with it and knocks them prone. However, the attack itself is innaccurate, and hit or miss, you also take a lot of damage and fall prone. It also triggers if you die, but even so, I'd say that this isn't worth it.

Instinctive Flight: This feature replaces Draconic Heritage, and lets you fly 6 squares as long as you land at the end of your turn. It's the same as the Bozak feature.

Murderous Eye: This feature replaces Dragonborn Fury, and grants you combat advantage against enemies afflicted with some conditions. Both features make you more accurate, although Rogues will likely prefer this over Dragonborn Fury.

Sinuous Agility: This feature replaces the normal Dragonborn ability modifiers, and grants you +2 Dexterity and +2 Charisma. This obviously makes some new classes much more viable for Dragonborn characters now, including Rogues, Rangers, Monks, and Assassins.

Caustic Heritage: This feature replaces Dragon Breath, and grants you a pair of racial powers. The first, Toxic Saliva, makes your next weapon attack deal extra damage and (save ends) slows foes, which synergizes pretty well with Murderous Eye. You also get a daily power called Acidic Revenge, which deals some acid damage to the enemy that kills you. These powers are okay, I guess. Better for some classes than Dragon Breath.

Weapon Talent (PH1): The most basic of fighter techniques, although sometimes simple is the best way to go. You should generally go with a more Constitution oriented weapon such as an Axe or a Hammer. 

Battlerager Vigor (MP1): An excellent way for you to stay in the fight for a long time. Your high Constitution will enhance your healing surges too, giving you some extra staying power as well. 

Tempest Technique (MP1): While less Constitution focused than the other two paths, Dragonborn can make fine Tempest Fighters as well. 

Brawler Style (MP2): Fighting with your bare hands is all well and good, but other than strength, we Dragonborn don't have much else synergizing with this build, and it seems to be the least effective fighter style at the moment. Still, we can pull this off if we must.

Arena Training (DSCG): While you'll want to have Dexterity as a secondary to gain full benefits from this feature, you can't argue with what it offers. A bonus to AC and free training with 2 superior weapons is nothing to scoff at.

Combat Superiority (PH1): This is a good class feature. Very good indeed. Unfortunately, this feature is at-odds with our Charisma boost. Still, even if we don't get any attack bonus with this, the foe-stopped part is nice.

Combat Agility (MP2): If you focus on Dexterity as a secondary stat, then go with this. If you do so, use Charisma to bolster your Will defense, rather than your Wisdom.

Knight (HoFL): For those who prefer more basic defending techniques rather than flashy attacks, the Knight is serviceable. It has a strength primary, constitution secondary, and several charisma-related skills including intimidate.

Slayer (HoFL): Unlike most other fighter builds, this one is all about striking, although your toughness means you can absorb some punishment too. Strength is your primary, and Dexterity will be your secondary, which means your Charisma bonus will be boosting will and intimidate, and Constitution will contribute at most one or two extra HP to your surge value. Not completely synergistic, but it works.

Two-Blade Style (PH1): One of the stronger options for a Dragonborn ranger. You might want to try raising Constitution as opposed to Dexterity or Wisdom, get some heavy armor, and dual-wield hammers.

Archery Style (PH1): While traditional Dragonborn aren't very good archers, Kapak Draconians have the Dexterity to make something of this. Just don't expect your Charisma to do much for you. 

Beast Mastery (MP1): Although Strength can help you fight like this, the truth is that most of these creatures aren't that solid as companions. It's often better if you strike down foes yourself. 

Hunter Style (MP2): Like archery, be a Kapak Draconian if you want to pursue this ranger path. It focuses on balancing melee and ranged combat, so if that sounds interesting to you, go for it.

Marauder Style (MP2): Like the Two-Blade style, this particular feature requires strength, which you have. It's more defensive and mobile than the Two-Blade style, so if that's the way you wish to fight, then look over here.

Prime Shot (PH1): Definitely more use to archers at first. However, there are feats that extend this bonus to melee attacks, which is why they may want to stick with this feature.

Running Attack (MP2): If you move and attack with one action, you get a bonus to that attack. This is better for Dragonborn, because it means we get a bonus to attacks from the get-go (especially if you favor techniques like Marauder's Rush).

Scout (HoFK): The Essentials version of the two-blade ranger. Go Kapak or go home, since Dexterity is so important here.

Hunter (HoFK): The only Ranger build to be an outright controller. If you want to do this, go with Kapak heritage.

Brutal Scoundrel (PH1): Since you can't have both Strength and Dexterity, this isn't going to be as good a path for you. Still decent.

Artful Dodger (PH1): The Kapak Draconian's choice for skulduggery. Your Dexterity and Charisma fit perfectly here, helping you move around the battlefield with impunity. 

Ruthless Ruffian (MP1): Yes, you have the Dexterity to make this possibly work. It's just that this path focuses on using maces and clubs, which are terrible weapons. 

Cunning Sneak (MP2): An okay choice. This requires both Dexterity and Intelligence to be effective, both attributes that aren't pronounced in Dragonborn. Kapaks aren't especially stealthy, but they can make this work.

Rogue Weapon Talent (PH1): Choose this talent if your preferred way of snuffing out a foe's life is with a dagger or a shuriken.

Sharpshooter Talent (MP2): If you like fighting from a range with crossbows or slings, than you'll want to go with this.

Thief (HoFL): Like any other Rogue, its married to Dexterity. However, its secondary stat is open; the preferred stat for the Kapaks that become theives will be, of course, Charisma.

Inspiring Presence (PH1): Inspiring Warlords require both Strength and Charisma to be effective, and we have both in spades. Standing at the front of battle, bringing glory to ourselves and our allies. Can you imagine anything more majestic? 

Tactical Presence (PH1): While our strength definitely helps, and Charisma improves our Will Defense, generally the greatest Tacticians, Genasi and Eladrin, have more Intelligence than we could ever hope to achieve. 

Bravura Presence (MP1): This path is more suited to us than even the Inspiring Presence is. Charging right into the thick of the fray and leading our allies with sheer bravado is something we Dragonborn can do better than any other race can. This is due to our inherent Strength, our Charisma, and our draconic toughness. 

Resourceful Presence (MP1): Both Strength and Charisma are key stats in this path, which makes it good for us. Being Resourceful also means working on your book smarts, so be sure to have a good Intelligence. Overall, it can work for us, but we serve our allies much better by inspiring them, either through words or actions. 

Insightful Presence (MP2): You've got the Charisma to make this presence work for you (don't go with Wisdom). This presence is for those who prefer to keep their allies safer. There is some controversy about how long the bonus to defenses this provides lasts, so be aware of that.

Skirmishing Presence (MP2): This presence is for those who prefer a more mobile force at their disposal. If you go with this presence, use Intelligence to boost you attacks, so that your Wisdom and Charisma scores aren't taking up the same place boosting Will.

Melee Warlord (PH1): Not a class feature, per se, but instead this represents those who stick with melee weapons as opposed to bows. You'll generally want to do this, because the builds you favor all prefer to be in the thick of combat.

Archer Warlord (MP2): If you wish to be an Archer, this is the best way to do so. Generally, Archers choose the Skirmishing Presence, but you're not limited to that Presence. You'll likely want to take a combat style to open up more attacks, including several that fit Inspiring Presence.

Combat Leader (PH1): A bonus to Initiative for everyone is awesome. Nothing more need be said.

Canny Leader (MP2): Perception and Insight are generally considered some of the most important skills there are, and getting a boost to them is nice. Compared to the other options here, though, there's no contest whatsoever.

Battlefront Leader (MP2): Out of the gate, this isn't as good as Combat Leader is. It does get some nice feat support, though, and can become a strong option with time.

Infernal Pact (PH1): It used to be that we weren't that good with this pact. However, with the ability to get Constitution as an ability boost, we can now use this pact as well as the tieflings themselves. Having a high Constitution as our main attack stat means the highest damage Dragon Breath possible, and our enhanced healing surges on top of the Temporary HP the pact grants means that you'll be one of the most durable strikers around. 

Fey Pact (PH1): Our enhanced Charisma means making a pact with a Fey entity (a Mirage Dragon, perhaps?) is good way to us magic. Be aware though, that neglecting a physical stat will mean a drop in your Dragon Breath's effectiveness, so Dragonfear might be a better option for you. 

Star Pact (PH1): What lies beyond the stars, no one can say for sure. I can't guarantee that you'll be able to safely wield this power while remaining sane, but dealing with the alien entities of the Far Realm can have its benefits. You'll be keeping both a high Charisma and Constitution, which means you'll have access to the full spectrum of Warlock powers, and your Dragon Breath will remain powerful. Again, having Constitution as a boosted ability here is a good idea; you'll be able to pull off either a Con-based, Cha-based, or Con/Cha split Starlock pretty well.

Dark Pact (FRPG): If you think that the dark entities that lurk at the edge of the Drow civilization have the most to offer you, then you'll be able to use that power because of your high Charisma, and you'll have constitution backing your toughness up. The warning about the Dragon Breath loss of effectiveness remains a problem though. 

Vestige Pact (AP): Like the Infernal Pact, you'll be making Constitution a main stat here. The ability to change pact boons based on which Vestiges you are contacting is interesting. Perhaps you'll be able to contact ancient Arkhosian rulers in your travels?

Sorcerer-King Pact (DSCG): Forging a pact with one of the Mighty Sorcerer-Kings of Athas nets you spells that can be used with either Constitution or Charisma. You can make either score work for you, and it depends on whether you prefer Charisma-based skills or Constitution-enhanced surges. If you do go with Charisma, Powerful Breath is a good feat, or go with Dragonfear as a Racial Power (it works thematically too).

Elemental Pact (HotEC): Some Dragonborn deal with the forces of the Elemental Chaos. The attack powers associated with this pact require Charisma to use. So I'd recommend going with a Charisma-Intelligence focus, with Constitution being a tertiary stat.

Infernal Hexblade (HoFK): You have the perfect stats to be able to use this pact to its fullest extent. Your charisma and toughness both play an important role in dealing with foes, and your draconic toughness means that you won't be going down easily.

Fey Hexblade (HoFK): Since Dexterity is a required secondary stat here, you'll probably only want to swear this pact if you're a Kapak Draconian. All the cold damage you throw around here is pretty nice, since it works with the Frostcheese combo.

Star Hexblade (HoFK): Not much to say about this pact that can't be said about the Fey Hexblade, except you'll be using Intelligence as a secondary stat instead of Dexterity. Which makes either Dragonfear or Powerful Breath a necessity.

Gloom Hexblade (HoS): Some Hexblades make pacts with creatures in the Shadowfell. They need Dexterity, which means that they tend to be Kapak Draconians.

Elemental Pact (HotEC) If your going to be a Hexblade, this is probably the pact you want to make. This is because, on top of having the Charisma and Constitution to make this pact work, it has great synergy with the Rod of the Dragonborn. This is because its primary At-Will attack creates vulnerabilities on enemies it hits, which you can subsequently take advantage of due to said Rod. Whether you're dealing with genies or tapping into inborn Elemental Power, this pact is a good pick.

Gloom Pact (HoS): I'll just go ahead and say that any Dragonborn who makes a Binder's pact is going to have a tough road ahead of them. Sure, you have the Charisma to make these pacts work, but the features and powers make controlling the battlefield, which is the Binder's schtick, very difficult to accomplish. Of the three pacts, this is probably the best, if only because Echoing Dirge is a decent At-Will attack, and because this pact also uses Dexterity, which synergizes with Kapak attributes.

Star Pact (HoS): Like other Binder pacts, not a good idea.

Fey Pact (D406): You're better served swearing some other kind of Fey Pact than this one.

Staff of Defense (PH1): This is the best way for a Dragonborn to be a Wizard. Your Constitution boosts will help your Healing Surges and Dragon Breath, and your Strength and Charisma boosts can get you some nice feats, like Hide Armor Proficiency and Spell Focus. 

Wand of Accuracy (PH1): Not quite as nice for you as the Staff of Defense, but by boosting your Dexterity your at least keeping your Dragon Breath accurate. Obviously, go Kapak if you want the best Dexterity possible.

Orb of Imposition (PH1): This is the worst arcane implement for you to specialize in. There's no stat synergy for you at all, and your Dragon Breath will be all but useless as you focus of Intelligence and Wisdom. 

Orb of Deception (AP): Although most Dragonborn disdain fighting opponents using trickery, our enhanced Charisma makes us decent at doing so. Just know that your breath will be falling behind. 

Tome of Binding (AP): This implement is Constitution-based as well, which makes it nice for racial synergies. Plus, you can fluff your powers as summoning other dragons to fight for you, which is quite excellent indeed! 

Tome of Readiness (AP): This feature isn't bad as a second implement, as it isn't based off of any secondary stat. Additionally, it provides some additional flexibility that can always be handy.

Evocation (HoFL): Not a bad choice, seeing as it utilizes Constitution as a secondary stat. Generally considered the weakest of the current schools though, seeing as its features are lacking compared to them.

Enchantment (HoFL): Your Charisma is the secondary stat you'll be focusing on here. Intelligence primary and Constitution secondary. This kind of trickery is generally frowned upon by other Dragonborn.

Illusion (HoFL): If you want to be an illusion-focused wizard, you're better off with the Orb of Deception, seeing as you lack both Intelligence and Wisdom.

Pyromancy (D391): Perhaps the best school of magic for you to use, if only because of the synergy it has with Draconic Spellcaster. Constitution is your secondary stat here, so keep that high.[b]

Witch (HotF): Witches have kind of a bad reputation among just about everyone, and for good reason. While you have access to many excellent Wizard powers, you basically have none of the excellent Wizard class features. You also have neither the Intelligence or Wisdom to make this really work.

Sha'ir (HotEC): Another Wizard who gives up most other Wizard class features, to get oddly-scaling elemental resistance and unique Gen Familiars. If having a tiny genie serve you sounds neat, take this. At least your Constitution will be helpful here.

Bladesinger (NWCS): A style of blending magic and blade developed by the Elves. As far as we're concerned, they can keep it. A Kapak Dexterity boost can be helpful, but only real specific races can make any good use of this form of wizardry.

Aegis of Assault (FRPG): Your Strength boost will help out with your Assault power riders. That's it, really. 

Aegis of Shielding (FRPG): It's always nice to have Constitution boosted as a secondary score, and now you have the ability boost to actually use it well.. 

Aegis of Ensnarement (AP): Like the Aegis of Shielding, this is also Constitution based. It can work but you won't be the best at it.

Virtue of Valor (PH2): Undoubtably the better way for you to be a Bard. Your Charisma fuels your attacks, and having a high Constitution means better power riders, more temporary HP for your comrades, better healing surges for you, and a nice, strong Dragon Breath. If you wish to fight on the front lines with magic, look no further. 

Virtue of Cunning (PH2): Your Charisma means that you can do well with this path, but you'll be neglecting a physical stat, which means you're Dragon Breath won't be all that useful; Dragonfear is a better choice. Constitution will end up boosting your Fortitude and HP.

Virtue of Prescience (AP): Like the Virtue of Cunning, your Charisma allows you to pull this off to decent effect, but lack of a physical stat means your breath will atrophy.

Skald (HotF): This is a different kind of Bard, one who augments his basic attacks with Martial tricks and Arcane songs. It's something you can do well, since Charisma is the only real important stat here. Constitution could be helpful if you want to pick certain utility powers or multiclass in certain ways. Dexterity is also a nice secondary stat, if you'd rather go with that instead.

Dragon Magic (PH2): Unsurprisingly, this is the way for us Dragonborn to utilize magic. Tapping into your Draconic Blood requires a lot of Charisma and Strength, which we have in spades, and our Draconic Heritage will keep us fighting on the front lines longer. 

Wild Magic (PH2): It's not as natural a fit as Dragon Magic is, but we can use magic taken from the elemental chaos effectively as well. Just be aware, though, that you'll want to be a Kapak Draconian if you want to tap into this kind of magic as optimally as possible.

Cosmic Magic (AP): If tapping into your Draconic blood seems too cliche or simple, then accessing the magic of the heavens is an excellent way for you to fight (and certainly safer for your sanity than swearing a pact to the Eldritch Horrors of the Far Realm). Like Dragon Magic, having a good Charisma and Strength will help you control the ebb and flow of the magic. 

Storm Magic (AP): Some Sorcerers' powers come from the very essence of storms themselves. Like the Blue Dragon, you too can command these powers, although you'll likely want some Kapak as features as well so that you can use this form of magic to its fullest potential.

Elementalist (HotEC): This is the spellcaster for the person who'd rather blast enemies with fireballs all day, rather than try and decide which spell works best for a situation. Like other sorcerer builds, we do well here, this time putting our flex stat in Constitution, since Elementalists need that.

Battlesmith (EPG): Dragonborn with a Constitution flex stat can do well with this path. 

Tinkerer (EPG): One the other hand, this really does nothing for you, as it lacks a physical stat with which to bolster your Dragon Breath.

Warrior Forge (D381): Like the Tinkerer Artificer, this build has no synergy with you whatsoever.

Battle Cleric (PH1): As clerics, Dragonborn tend to fight on the front lines with our allies, our natural Strength enhancing our blows and our Charisma helping boost our powers' rider effects. Be sure to have a decent Wisdom score as well.

Devoted Cleric (PH1): We Dragonborn just don't fire "lasers" as well as other race clerics can. You can do so, and Charisma will help with some of the power bonuses, but your Breath attack will suffer. You'll generally want Constitution as a flex stat.

Shielding Cleric (DP): Like the Devoted build, there's some synergy here with the Dragonborn's Charisma boost, but you just aren't as good at this. You'll want Constitution, as has been mentioned. Furthermore, most Dragonborn just can't imagine living as pacifists.

Warpriest (HoFL): Warpriests are the Essentials version of the cleric. They need Wisdom and Constitution; at least you have Constitution covered. The Storm Domain is most thematic considering you can have Lightning Breath, but any of the domains can work.

Avenging Paladin (PH1): The Dragonborn's natural strength lend us to being grade-A strength-based paladins, and our Charisma helps make our Divine Challenge stronger than most other strength paladins. Be aware, though, that your Divine Challenge will still be rather weak overall, unless one takes Mighty Challenge from Divine Power.

Protecting Paladin (PH1): Likewise, Charisma also helps Dragonborns with the Charisma side of things. Your Divine Challenge is among the most powerful there is, but unfortunately, not focusing on a physical stat will mean the degradation of your Dragon Breath. Protecting Paladins are generally better served with Constitution as a flex stat, along with the Powerful Breath feat.

Balanced Paladin (PH1): Dragonborn are one of the only races who can pull of the Balanced Build well, boosting both Strength and Charisma, and choosing the best Paladin powers of either build. While this results in a rather versatile paladin, be aware that your power riders won't be that strong, and you'll only be able to use Lay on Hands a few time per day.

Lay on Hands (PH1): The classic paladin power, and the one with the most feat support. Especially if you favor the Charisma end of powers, you'll be liking this. Just be sure to have a good Constitution (you'll want one anyway as a Chaladin, what with Io's Challenge), lest you run out of healing surges prematurely.

Ardent Vow (DP): Paladins who use this power are generally more striker-like in their outlook. The ability to reliably Sanction a foe is this power's main draw, although the bonus damage is also nice. 

Virtue's Touch (DP): This power is a lot more situational than the other two, but when you need it, you'll be glad you have it. The ability to end a blind, daze, or stun effect on an ally (no need for saving throws) or yourself can be enormously handy.

Cavalier (HoFK): Cavaliers are the Essentials versions of Paladins, who draw in close to enemies and punish them with searing radiance if they aren't challenged. Strength and Charisma are important to these Paladins, and they are what we Dragonborn have in spades.

Blackguard (HoS): Blackguards are the darker reflections of Cavaliers, drawing upon shadow magic in addition to divine prayers. Blackguards like having a lot of Strength and Charisma to lay down the hurt, and look what you just happen to have. Packing cold breath is optional, but thematic.

Censure of Pursuit (PH2): Of the two Censures there are, this tends to be the better choice for a Dragonborn Avenger, if only because having a high Dexterity will lend accuracy to your Dragon Breath.

Censure of Retribution (PH2): No stat synergy, no Dragon Breath… This path really isn't for you at all.

Censure of Unity (DP): You'd think that the Avenger build that emphasizes Teamwork the most would be right up our ally, but you'd be wrong. Most Unity-based powers focus on Intelligence, which of course leaves our breath out in the cold…

Covenant of Protection (PH2): There's no real ability score matchups here, and your Breath Attack isn't going to be doing much good without a Physical stat to depend on.

Covenant of Wrath (PH2): This is better for Dragonborn, because Constitution helps boost your healing surge value and your Dragon Breath accuracy and damage.

Covenant of Malediction (DP): This is probably the way to go for Dragonborn invokers, because we're tough enough to take any damage that we inflict upon ourselves while speaking words of power.

Wrathful Hammer (PH3): For Dragonborn, the best way to learn Runes is through forgework and muscle memory. Rather than study the runes, we use runes, and doing so in this fashion requires both Strength and Constitution, which is just excellent for us overall. Our Charisma modifier will also be excellent as a way to boost our Will defense.

Defiant Word (PH3): Although we can do well with this, our strength being an excellent boost, this path focuses on Wisdom, which means that our Charisma is basically going to waste. This can be done if you really want to, but it doesn't work as well for us as it does for, say, Minotaurs or Shifters.

Serene Blade (D404): Like Defiant Runepriests, you need Strength and Wisdom to work this path. And, like them, it's workable, but a waste of our Charisma. At least you get some free proficiences with Swords out of the deal.

Rageblood Vigor (PH2): A Dragonborn's enhanced Strength powers your attacks, and your Charisma provides a Will boost. Increasing your Constitution also means bigger healing surges and enhanced Dragon Breath damage too. A good choice.

Thaneborn Triumph (PH2): This path is more suited to Dragonborn, though, because you're scaring opponents into defeat. Your larger-than-life Charisma helps you do this, although having a good Constitution is a good idea as well.

Thunderborn Wrath (PP): Like the Rageblood Barbarian, a good choice. Strength primary and Constitution secondary will give you good power, great healing surges, and a powerful dragon breath. For thematic reasons, you might want to get Lightning Breath.

Whirling Slayer (PP): You'll be pretty decent at this path, what with having the proper main ability score and all. It's just that the dexterity focus of this path isn't all too synergistic with the other racial features you have.

Berserker (HotF): This form of the Barbarian is both Martial and Primal, which is pretty cool. Your basically an all-martial defender until you decide to uncork some Berserker Fury, upon which you shift into a Primal Striker. At any rate, Berserkers like Strength and Dexterity. Your Charisma will mainly be used to help make Intimidate checks (come on, what Barbarian doesn't have Intimidate?) and to boost your Will defense.

Primal Guardian (PH2): Having a good Constitution modifier helps your surges, AC, and Dragon Breath damage. Be sure to keep it high.

Primal Predator (PH2): A Dexterity focus means that Kapaks can make passible Predator Druids.

Primal Swarm (PP): Another good Dragonborn druid path. The Constitution focus is handy, and the damage resist can be rather valuable. And because Hide Armor Expertise now no longer provides the uber AC bonus it once did, your Draconic boost to healing surges will be just that much more valuable.

Circle of Renewal (HotF): The more leaderly of the Protector builds works well for you, since it requires Constitution in addition to Wisdom.

Circle of Shelter (HotF): The more offensive Protector build doesn't work as well for most Dragonborn, but Kapak Draconians have the dexterity to make something of this build.

Sentinel (HoFK): The Sentinel, unlike the Wildshaping Druid, is a weapon-wielding primal leader with an animal companion. Since Constitution is a good thing to have here, it's not a bad choice, but you'll never be great. I'd recommend going with the Spring Season, since it has attack bonuses that should offset your lower Wisdom.

Protector Spirit (PH2): The Constitution focus of this path provides benefits I'm sure you know about by now. As has been mentioned, getting heavy armor is a good idea.

Stalker Spirit (PH2): This path has no Physical stat attached to it, which means that your Dragon Breath will become useless.

Watcher Spirit (PP): Kapak Draconians, with their DEX boost, can make decent Watcher Shamans. That's all I can say about it.

World Speaker Spirit (PP): You'll be about as good at this as the Protector build. It really depends if you want to focus on healing or focus on control.

Elemental Spirit (DSCG): This spirit focuses on the same abilities that the Stalker Spirit does, which means it doesn't really work for you at all.

Earthstrength (PH2): The best way for a Dragonborn to be a Warden, because of the Constitution synergy with Dragonborn racial features. Your enhanced strength help fuel your powers. At character creation, you may choose to invest in some Charisma to boost your Will defense instead of Wisdom.

Wildblood (PH2): While it isn't as nice a fit for a Dragonborn as the Earthstrength build is, Dragonborn can make perfectly fine Wildblood Wardens.

Lifespirit (PP): Your STR bonus is a good fit, and while the WIS focus isn't as natural, you can still do some good here.

Stormheart (PP): Like the Earthstrength build, you focus on CON as a secondary ability here, which means you'll do well with this path. Dragonborn who hear the call of the storm spirits will often have lightning breath the reflect that tendency.

Bloodbond (PH3): The Bloodbond path isn't for just any Dragonborn. Only Kapak Draconians have the Dexterity to rise to heights of mediocrity as a Seeker.

Spiritbond (PH3): Traditional Dragonborn seekers tend to favor more stalwart spirits over bloodthirsty ones. Your Strength bonus is what makes this a better deal for you overall.

Mantle of Clarity (PH3): Not so good for us. Our Charisma helps with the hitting, but no physical stat means a weaker Dragon Breath. Not to mention that the idea of being on the defensive just doesn't sit as well with most Dragonborn anyway.

Mantle of Elation (PH3): The way to go. Charisma and Constitution play directly to Dragonborn strengths.

Mantle of Impulsiveness (PsiP): Another good Ardent Mantle for you. This one plays a little more recklessly than the Elated Ardent does, so your extra durability will definitely be helpful.

Quick Battlemind (PH3): If you want to be a battlemind, I'd recommend following this path, since in addition to the Constitution focus, it also rewards having a good Charisma score.

Resilient Battlemind (PH3): Having a good Constitution here is always helpful, but since Charisma is redundant with Wisdom as a secondary stat, this isn't quite as synergistic for you.

Harrier Battlemind (PsiP): There isn't a real secondary stat here, which means that focusing on Charisma as a secondary may get you somewhere.

Wild Battlemind (DSCG): With Charisma as a secondary, you'll find this to be an excellent choice as well. With all of the Forced Movement emphasis that this tradition has, investing in Lightning Breath and Thundering Breath should be a fairly thematic choice.

Centered Breath (PH3): Not so good for us. There's no real stat synergy here.

Stone Fist (PH3): This form of Monastic Discipline requires strength.

Iron Soul (PsiP): A Constitution focus is useful to sync up with our racial features, making this a good choice.

Eternal Tide (HotEC): Like the Stone Fist, this tradition uses Strength, so it's not a bad choice. Definitely has more of a controller bent, which could be useful

Desert Wind (HotEC): The purest striker of the Monastic Traditions, this path requires Charisma, of all things. This makes it the best choice for a Kapak Draconian monk. Maybe keep your Dragon Breath, so that you can blast foes with even more fire! Just be sure to find a way to punch through fire resistence; you'll be dealing it every round.

Telekenetic Focus (PH3): Just a bad deal for us in general, with no stat synergy whatsoever. 

Telepathic Focus (PH3): If you must be a Psion, then take this, as your Charisma will be bolstering you power riders, and Constitution will boost HP and surges. But be sure to take measures to make your Racial Power useful.

Shaper Focus (PsiP): Another Psion route that emphasizes Charisma, this time as a way to conjure or summon creations of pure thought. If Telepathy isn't your thing, try this.

Bleak Disciple (D379): The focus on Constitution is definitely welcomed in this profession: dealing with the forces of the Shadowfell tends to make one rather frail.

Night Stalker (D379): The focus on Charisma here lines up with our stat boosts as a Kapak Draconian. Stay out of sight, and strike down foes as quickly as you can.

Executioner's Guild (D400): No. If you want to be an excecutioner, be an executioner.

Executioner (HoS): Assassins with a more martial bent, Executioners lean towards one gigantic attack to try and outright kill an enemy at the beginning of battle, along with poisons to debilitate their foes. Certainly not tactics that most dragonborn like, but hey, if it works. As I've iterated above, go with Kapak heritage for the Dexterity boost; all your attacks are based off of it.

 
 

 

 

 

 

 

 

 

 

Blood of Dragons (D388): You get a bonus to defenses vs. fear attacks, and the bonus doubles if the foe is a dragon. While avoiding the stunning effect of fearsome presence is nice, these bonuses are just too situational for me to recommend highly.

Draconic Guardian (D388): This feat is a good pick for Dragonfear Defenders, especially Wardens and Battleminds (Fighters already mark with all of their attacks anyway). For everyone else, this allows you to pull a little defender duty if you need to.

Intimidation of the Dragon (D388): Basically Skill Focus, but a little better. Unless you live and breath intimidation, skip this one.

Dragon's Rejuvenation (D388): When you use Second Wind, you recharge Dragonfear. A solid feat through and through.

Dragon's Terror (D388): You can now daze a foe hit by Dragonfear (only one, but that's still rather nice). Come Paragon Tier, I'd say that this is a mandatory feat for every Dragonfear user out there.

Argentum Agent (D385): Although this Paragon Path is open to any Dragonborn, it most benefits Strength-based Defenders like Fighters, Paladins, or Wardens. The features include a mix of extra marking, Dragon Breath buffing, and cold resistance. The attack powers focus on restraining enemies, something that Defenders really like, and a utility power that lets you rush to the side of a prone or dying ally. Overall, solid for Defenders, but really not worth it to anyone else.

Mercurial Assassin (D385): This paragon path has a rather unique niche, in that it is mainly for Dragonborn Rogues and Assassins. For them, this path provides some nice benefits, including bonuses to movement and some additional protection against opportunity attacks (Dragonborn Rogues who opt to be Artful Dodgers should be able to maneuver around the battlefield without being hit very often at all). The powers themselves are nice, with the big standout being what is essentially an improved version of the Changeling's Change Shape power. This power alone might be what makes this path a keeper, since the utility of hiding your true shape cannot be understated (just be sure to keep your Charisma high, so that others believe you when you say that you're a Shardmind Fighter named Biff).

Mithral Arm (D385): One of the most popular paragon paths for humans is the Adroit Explorer. It's a very versatile path, basically able to improve anyone who takes it, regardless of class. A group of Mithral Dragons called the Pentad saw this, and decided that they'd give Dragonborn an equally versatile path as well. The attack powers are all based off of your classes powers, so any class likes this. Astral Luck and Prophetic Action are both equally useful to any class, and just about everyone won't object to teleportation as a move action they can take at any time (you won't be using your move actions to shift past level 16). One caveat with this path is that you might want to train Nature, Religion, or Arcana to take advantage of the one non-combat aspect of the path (this is basically in addition to everything else, which by itself would have made this path great. This is just an extra fluff option). If nothing else, you'll be able to pick up plot indicators, which can be helpful.

Scion of Arkhosia (PH2): Any Dragonborn with solid physical stats (especially Constitution) and the urge to fly will like this path. The features grant you a hybrid of Adaptable Breath and Admixture Breath that you can change up when you want, automatic damage when an action point is spent, and overland flight. On the power side of things, Dragon's Wrath gives you a ranged attack similar to Hurled Breath, Dragon Wings give you… something… I guess I'll remember later, and Clinging Breath is similar to Dragon Breath, except it inflicts ongoing damage, and hurts on a miss.

Steelsky Liberator (FRPG): An absolutely wonderful path for any strength-powered Dragonborn in a campaign rife with Dragons and/or Elementals. You can regain Dragon Breath with an action point, you get defensive bonuses against dragons, and a bonus to saves against fear and charm effects. The power's are okay too, with Liberator's Blow allowing you to make a strength attack with a ranged weapon. The other two daily powers are awesome, Steelsky Stance allowing you to keep a draconic or elemental foe weakened throughout the encounter, and Break the Chains granting saves against Fear and Charm effects that could normally not be saved against. If you find yourself not fighting a lot of dragons though, you can pass it over.

Honorable Blade (PHR): Dragonborn who rely on their Martial talents might like this path. The features include allowing your Weapon to deal the same damage type as your Dragon Breath (thus allowing Frostcheese without needing a Frost Weapon), getting a free use of Dragon Breath on an action point, and getting resistance to your Dragon Breath damage type. The powers are mostly good, with an excellent encounter power that allows you to respond to flanking foes with a shift and Dragon Breath retaliation, and a utility power that allows you fly without wings. The daily power is this path's only true weak point, a close burst that deals piddly damage for its level. Beyond that, though, this is all good.

Inner Dragon (MP1): A solid path for Battlerager Dragonborn, or really any Dragonborn with a strong Constitution score. You can regain Dragon Breath with an action point, your Dragonborn Fury becomes more potent, and you can even make your Dragon Breath deal ongoing damage. On the power side, Dragon Blast is a nice reaction attack, Ancestral Manifestation allows you to become bloodied while still retaining your toughness, and Dragonbreath Strike provides some nice bonus damage with melee attacks (depending on your Constitution, that is). In addition to fighters, Rageblood Barbarians, Valorous Bards, and Infernal Warlocks can find use for this path.

Glee-Born (D385): This path is for Arcane Dragonborn, and its abilities and powers focus on combat advantage, whether it is getting it yourself or avoiding it. The attack powers aren't too bad, but overall, the path is a little underwhelming.

Ninefold Master (PHR): An excellent Paragon Path for any Dragonborn versed in the Arcane arts. With it, you can make Dragon Breath an arcane power with its power boosted by your implement, gain resistance to the damage type that your Dragon Breath deals, and regain your Breath by spending an action point. As far as power goes, the attacks mimic your Breath to some extent, while the utility power allows you to negate attacks with the same damage type as your Dragon Breath. If you choose this path, consider taking the Adaptable Breath feat, since the extra damage types will certainly be useful with the features and powers of this path.

Adamant Instructor (D385): A path for any Divine Dragonborn to take, although you'll want Wisdom or Charisma as a primary or secondary ability. The action point ability is kind of leaderish, but helps you as well, which is good. Your Dragon Breath also deals thunder damage, does more damage, and pushes a little. One feature gives you a bonus to insight checks, and lets you make insight checks in place of diplomacy, but that won't often happen unless your class gets insight and not diplomacy, or you dump Charisma in place of Wisdom (which could happen). The powers are all solid, if not spectacular (although the Daily power does dominate, which is always handy).

Platinum Templar (PHR): A path for Divinely-inclined Dragonborn who worship Bahamut. While the path is open to all Divine classes, its focus on Charisma means that generally only Paladins or Clerics will want to take it. The features are all solid, including granting allies a bonus to defenses when using Channel Divinity, getting a saving throw supercharged with your Charisma modifier on an Action Point, and allowing your Dragon Breath to inflict a save-ends slow condition. The powers are nice to, including getting a temporary flight power that comes with an Immediate Interrupt attack, a utility power that should see use in diplomatic skill challenges, and a mass-stun daily power.

Storm Dragon (PHR): This path has great flavor to it, but it's a little over the place as far as ability scores are concerned. Its features include getting Lightning and Thunder resistance, pushing foes your Charisma modifier on an action point, ignoring a foes lightning and thunder resistance, and getting overland flight. The powers are a Wisdom-based attack that grants you temporary flight, a utility power that gives your entire party flight, and a Strength-based attack that creates a zone. I want to like this path, but its just a bit too MAD for me to recommend it that highly.

Fear Walker (D388): This Paragon Path is only open to Dragonborn who use the Dragonfear power, and its all about fear effects. So loading up on fear powers is a good way to use this path. Thaneborn Barbarians will especially like this.

Avatar of Io (PHR): Although Io is dead, there are some legends that say he is not truly gone, and that his power is merely laying dormant within the heritage of all Dragonborn until one worthy will take up his mantle and allow him to be reborn. This destiny confers upon it the greatest powers a Dragonborn can have, including a complete mastery of Dragon Breath; every damage type is available to you, it cannot be resisted, and powers that share the damage type of the breath you just attacked with will be more accurate. Your Strength and Charisma will also be boosted, a boon to several classes to be sure. Later on, you will manifest the Wings of the Dragon God, granting you mastery of the air itself. You will also gain a certain power that will allow you to save against debilitating effects before they effect you. Finally, when nearing Io's apotheoses, it is said that the Avatar will gain the ability to discorporate like a god will; death is a small hurdle, and the Dragonborn must only wait a few rounds before returning to the battle. Truly, a destiny worthy of Io himself!