Hell yeah! Unreal Tournament is probably my favorite FPS out there, due to its incredibly sense of speed, and the amount of mods that people make for the game. I used to play '99 but ever since 2k4 came out I became an addict to that, I still play from time to time. Unreal Tournament 3 is great too, I miss the whole double left/right strafe + jump. UT3 looks great, and is still pretty fun, the vehicles drive much smoother in this game. Too bad my computer is too poor to run it at High settings. On medium they look somewhat okay, I'm guessing it my be my fat CRT monitor that I still have that makes it look ugly.
I love playing UT2004, one of the only FPS's that got my interest. My favourite gametype is onslaught.