From what I've seen, the only special thing about being dragonborn is the need to absorb dragon souls to keep them from returning.
Anyone can kill a dragon, anyone can shout, your just a tool used to absorb dragon souls...
So what if you played a cowardly dragonborn who would hide from dragons and let his follower and town guards kill dragons?
All you would need to do is run out after the dragon has been dealt with and absorb it's soul.
Would seem like an interesting playthrough...

