Love GTAIII for sure, but it's gotta be San Andreas for me, easily. And I've played Vice City, but not a whole lot and I never beat it, so I can't really judge how good that one is. GTA2 on Dreamcast was fantastic, too.
01/12 - Zero Boys?
01/16 - Origin w/ Trog
01/24 - Into It. Over It.
02/09 - Amon Amarth w/ Enslaved, Skeletonwitch