[Samael]

Well it would depend on the type of anime really. I idealy I'd like to be an ace mech pilot in something Armored Core-ish, but if we were talking say fantasy/historical I'd have go with traveling swordsman. What can I say, I'm not very original.

Also, extremely powerful psychic wouldn't be a bad way to go either...

Problem with this is there's just too many ways to be badass in anime, I can't pick just one.