Baldur's Gate 26
Baldur's Gate II 25 Eye of the Beholder Series 10
Neverwinter Nights 18
Neverwinter Nights II 17 Planescape: Torment 7
*Also mourns Icewind Dale* I wouldn't have picked it as a winner in this group or anything, but it was a fun well-paced gauntlet of pure D&D combat. And the soundtrack was incredible.
Baldur's Gate 28 Baldur's Gate II 22
Eye of the Beholder Series 9 Neverwinter Nights 14
Neverwinter Nights II 15
Planescape: Torment 9
IWD was my distant third favorite after BG II and Torment... but better than the original BG. It always felt like a "filler" game in the schedule, but it may have captured the feeling of a "typical" D&D campaign better than any other.