I'm going to narrow my choices to DC since there seems to be a DC buzz around Prototypez
Although there are a bunch of characters I like from DC (Wally West, Pre 52 Shazam, Supergirl ..... etc) to narrow down to a single favourite, I'll list the character I'm missing from DC.
Damian Wayne
A 10 year old who could probably whoop you in a street fight. Easily. Embarrassingly so. With both hands tied behind his back. Blindfolded.
Oh yeah, he may be on the side of heroes, but he kinda kills people, but Batman gives him hugs instead of taking him to jail. Boss.