My Fav flash game, would have to be spacedpenguin, on addictinggames.com
That is theee best game EVER!
My fav. game that's not flash, would have to be CS 1.6, nothing can compair (I haven't played CS:S to compair, but... I don't know if I'll like it as well)
I HAVE played it a little, but not enough to get a real good feel for it.