A few of my favorites are Dungeon Siege I and II, Never Winter Nights (I never played the second), Titan Quest, EVE(but it costs too damn much), Black & White has some nice RPG qualities (second sucks), Sacred etc.
These that are already mentioned: Diablo I and II, Morrowind, and Freelancer.
Make sure you get all expansion packs as well... Morrowind - Bloodmoon and Tribunal, NWN got about 7 of them, Diablo II - Lord of Destruction, Sacred - Underworld, etc.
Just look it up in GameSpot or something
Benny
When in doubt, delete history and freeze transformations.
My latest snake game
(Requires DirectX9 SDK and Framework)