How true to D&D should BG be?

This is something that interests me. Personally I view BG not as a D&D game, but rather a game that uses D&D rules out of convenience. Some of you however are rule police and seem ready to point out an erroneous rule in a heartbeat. I'm interested in how many sit on which side of the fence and how you all feel about it.

This isn't directed at any feature request or anything, I'm just curious.