pool and cutthroat for sure, i don't play 9 ball that much. i do play quite a bit of pool though, seeing as there's a pool table in the commons block of my residence (ie 1 minute away) and it's free.
i used to play so much pool it got old... it passes alot of time in the summer when im not skating... i got a buddy that lost almost everything he had betting on pool games, like $400-500 games and shit... hes an idiot he couldnt even afford a pass this year because of it...