Well, I use RedHat, alittle Mandrake, and my new fav. Knoppix. And, im ashamed to say but i use winders 98 for games and such, although since i've seen the light of gaming (MUDs) i doubt ill be using graphical games any longer.
For some neato info, the MUD i play on is Prophecy, and its GREAT. You know why its great? Because it is powered by Red Hat Linux, kernel version 2.2.10 SMP. And the people who made it are die hard linux fans, that is why the game is made so flawlessly.