[PC] What is your Favorite PC game EVER?

This is going to date me as being older than 90% of the people on this board (and I'm not even old) but my favorite PC game of all time is Quest For Glory IV: Shadows of Darkness. The story, the art (I still love the hand drawn stuff compared to the 3d modeling of everything today), the music, and for those who have played it, c'mon, you totally dug the rusalka. I was like 13 and was like "whoaaaaaa" when I got to that part. Katrina's sacrifice at the end, too...just a great story and good old fashioned game. I wish they made 'em like that still these days. I mean, don't get me wrong, I'm looking forward to Mark of Chaos and Medieval 2 Total War as much as the next guy, but I'm also a sucker for the classics.

Other honorable mentions:

Crusader: No Remorse.
King's Quest V: Absence Makes the Heart Go Yonder.
Syndicate.
Fantasy General

More recently:

Warhammer: Shadow of the Horned Rat and Dark Omen.
Planescape: Torment (every rpg should have a story this good or the writers should be fired and replaced with competent people. I feel like modern rpg's are written by people who aren't actually writers, and perhaps haven't even graduated from high school.)
Baldur's Gate I and II and expansions. (NWN just didn't have the same magic.)
Rome: Total Realism (community expansion of Rome: Total War, about 1000x better than the original)

Thanks for the topic and the subsquent trip down memory lane.

Jam it back in, in the dark.