Anything were you can run around and kill stuff is good for me.
Quake 3, Unreal 2k3 (demo untill I can find money), Diablo 2, NWN (uninstalled it...using up precious space and Bioware is really working slowly on those linux binaries), tuxracer
, Worm anything (I have the latest 3...all fun!) I also like racing games, but the ones I have, I've beaten multiple times...I must say, they get old.
All played on PC. P3 1ghz (*shudder*), 32mb NVidia Geforce2 mx (it was nice until unreal 2k3 came out
) Out of hard drive space though, 2000 mp3s puts a bit of a dent in a 20gb hard drive (not to mention my 5 gigs for linux). Soon, I'll be investing in an 80gb hdd and an ATA 100 controller, so I'll be all happy.