Watch out if s/he's ASIAN! That's a typical stereotype.
Ooooooh, He's really CUT! Bet you he can fight. Another stereotype.
Hey, S/he's got a black belt. Watch out! Another stereotype.
Good fighters, in any mode, come in different sizes, shapes, colors and gender. Drop the assumptions. As I said in Raffi's forum. Observe the movement and the spirit. For me, those are better indicators than most others.