I have been looking around for the best and the worst chess960 starting positions. In the following position the h pawns are unprotected so both sides want to bring their bishops out and attack this weakness. Another possible weakness are the b pawns replacing the normal weakness of the f pawn. (http://www.chess.com/club/rosanna-library-chess960-club
In this game the b,c, and d pawns are all extremely weak if the knights are forced to move but all the other pawns are very strong.
The worst possible place for bishops is the b and g files as shown by the following image.
I hope this may help anyone who is just starting 960