I picked demonic/fell, planning ahead for ToB, figuring, hey, with level 40 chars, you've GOT to be fighting demons...I mean, what else are they going to throw at you, the tarrasque? And of course I was vindicated when they revealed that two headed nasty....
Racial enemies are kind've a toughie in BG2 because they got a hell of a lot more specific...there aren't that many of ANY of the powerful monsters, and you only really need the plusses on the toughest critters.