Dante from Devil may Cry 3-4

(all up to the upcoming version...he looks a bit too effeminate for my tastes in that)

Why? This is why:



Relaxed, funny dude with kicka$$ fighting skills who doesn't even blink at anything that comes his way.

and for a second character:

maybe Ken from Streetfighter 2 (and 3, and probably 4 as well...haven't checked it out yet.) he seems like he has fun with what he does.