GLaDOS, likes science and singing, dislikes you. From Portal.
Mega Man/Mega Man X, a brave little robot kid who likes to kill his enemies and steal their powers.
Scorpion, fire breathing ninja with a harpoon in his hand, from Mortal Kombat.
Tommy Vercetti, likes to chase after people with a chainsaw in Grand Theft Auto: Vice City.

Firebreathing?

Shit, that makes him over 9000 times better.

You've never seen him do this?

oh yeeeeeeeeeaaaaahhhhhh.......

and where did you get that gif? its AWESOME!

I found it here: http://fp.enter.net/~jkool/MKKOOLANIM.htm

There's one or two other gifs there too, but it isn't the most professional looking site on the internet. Just warning you...

Oh, I went there looking for the move scorpion does where he grabs people with that harpoon thing, but they don't have it :(