I forgot to mention that I had a Gamecube for a time too :D And I also played Oddworld on the original Xbox, another game that kept me going during times of illness. The main game that I played to keep me sane during long days and nights was the original Fable. I played that through so many times! I alternated between good and evil, and just replayed and replayed. I would play 11 hours a day sometimes :S It was either that or go mad!
Some other old school games of note: Sensible Soccer on the PC, Championsihp Manager, again on PC, with my favourite being the 97/98 season, and 4D Boxing on PC :D
I should also mention Doom, Heretic, etc. Operation Wolf!! Golden Axe! Wolfenstein!! Oh the memories!