Age of Empires Arcanum Baldur's Gate Baldur's Gate II Diablo I Diablo II Dungeon Siege Heroes of Might & Magic 3 Heroes of Might & Magic 4 (I like the music, the game... not so much) Half-Life 2 Icewind Dale 2 Lionheart: Legacy of the Crusader Sacred SW: KotOR The Witcher
Not a bad list, though the violins in Arcanum can cause one to fill the bathtub while rummaging around for razor blades.
Witcher 1 and Diablo 1/2 music is... awesome.
Also, IWD2 but not IWD1? Surely you jest.
I'll just add Deus Ex, Planescape: Torment and Fallout 1/2.