I constantly swear and taunt underneath my breath when confronting my enemies. It tends to boost my confidence and keep my mind clear. Upon hearing/seeing a Regenerator from RE4 or any other shuffling, lumbering but albeit creepy bastard I usually mutter things on the lines of
"Come on, come and get me..."
-fires shotgun-
"That's right, come on *****, you like it don't you?"
and lately, "Come on! HIT ME!"
Don't worry, I never do this online and even then, it's with the mic off.