what would he be like?
Mine would be a corrupt, murderous, and lying one who threatened pretty much everyone who didn't want to do what he wanted.

Very Nord/Viking.
I have a headache so I don't wanna spend too much time on this, but murdering people who try to insult or stop me is a regular occurrence. Nazeem didn't last long.

I keep him around so I can test my weapons on him. I just make a save, kill him, and reload.

What wouldn't he be? I mean, my Dragonborn can be cruel yet kind, heroic and also very evil. I guess he will be known as being moody.

https://dl.dropbox.com/u/439516/conan.jpg

this is a good summation of what I was trying to say. Don't accept rudeness and don't be rude unless I plan to kill a [censored].

My dragonborn would be remembered for being a rather nice guy. He collected daedric artifacts but refused to hurt those who didn't deserve it. He became a vampire lord but only feed on animals, the undead and criminals. He fought against the empire, helping the storm cloaks because he feels the empire failed him by letting the thalmor take his home province

I guess my dragonborn will be remembered as the scourge of skyrim. Helping forsworn on Cidhna Mine (he earned the rank of honorary briarheart), making most nord's lives miserable by supporting the empire and enforcing their WGC, being a ruthless Vampire lord, TG guildmaster and listener, making deals with almost every daedra known, and killer of nazeem.

And a nasty red skooma drinker. He's known for powering his ebony blade off kills the day he ran out of red skooma.

Everybody would hate the dragonborn because of me

Seems like a lot of peoples Dragonborns would be recorded as having a short temper.