Metroid Prime - about 35% of the way through.
Age of Mythology - no Titans expansion, just got it 4 days ago.
Planescape:Torment - just started
Civ III - whenever I have a few spare hours and I'm tired of the others.
Starcraft - sigh, still trying to beat the final Human mission before moving on to the Zerg. I suck.
Eternal Darkness - Got in the Haloween mood again.
Probably going to start Vampire:Redemption again.
Golden Sun - I just bought a Gameboy Player for my GC so I expect I'll be playing a lot more of this.
I'm glad to see I'm not the only one who has multiple games started at once. hehe