Not really putting much time into any single game:
PES6 - Game I play the most by far. Ultimate pick up and play game. Can't wait until PES7...bastards at Konami better not make the PC version based off the PS2 version again
Half-Life 2 w/ SDMOD - Pretty fun, SDMOD makes the game really flexible. Currently stuck because of a bug, but once I figure out how to continue, all is well
HOMMV - On and off. Not really digging it that much. Seems so half-assed and simplistic after playing AoW: SM.
Silent Storm/Sentinels - Really enjoy this game. Going to completely replace HOMMV for TBed goodness, even though I've already played them. Intend to use a No-PK mod.
Freespace 2 w/ Open Source mod - It's been on my HD for a little while. Deserves more attention.
Far Cry - Now that FEAR is done and I'm stuck in HL2 it will probably get some more attention.
Odin Sphere (PS2) - Looks really nice. Pretty unique game.
Melty Blood - a PC 2D fighter. Based on an anime I like. Shit graphics, but has decent gameplay.
Jets N Guns - Cool side scroller...but I suck and can't get past the 3rd level
Virtua Tennis 3 - Could Sega have made the game any easier? I'm probably going to shelve it.
Gearing up to play:
Oblivion w/ a shitload of mods - The latest version of OOO is about done, MMM is compatible with it, and Deadly Reflex 3.3 should be uploaded this weekend. Add some texture packs and a dozen or so other and you have effectively a new game
VtM: Bloodlines - New patch, figure I'd give another go (combat system put me off before, never got into it).
CivIV - Had it for ages, but haven't played. Figure I'd give it a go before I pick up GCII Gold.
DMoMM - Because it doesn't look like it will get much better with age
FEAR expansion - Finished FEAR a few weeks ago, getting the itch for more serious violence.
I'll probably load up JA2 at some point with some mods. It has been too long and I need to be reminded what near gaming perfection is like.
Looking at that list I think I may have ADD 8)