Cool. While we're here, though, I'd like to add some characters I'd prefer not to see:

Badass normal/absurdly skilled character: Already have two with Little Brother and Caracal. 

Psychotic crazy person: I just hate this character and see it way too bloody often. 

If your character has to be a jerk/arrogant/some other undesirable trait: Know how to play it properly. I've seen too many "arrogant" or "asshole" characters who are just unrealistic caricatures of their defining trait. They're not fun to play with, and they piss most other players off. Just know when to draw the line and how to play a happy medium.