I kind of liked Morrowind better on PC. Maybe it was just me. But like uncapped has said, DEFINITELY get KOTOR and Halo. Make sure to pick up Madden NFL 2004 if you don't already have it for another system, and also I'd have to agree that most of the good FPS's are on the Xbox.

Btw, my favorite GC game is Soul Calibur II.

JMBA Technical Solutions. For all your technical needs.