I tend to FF through them, just in case there's anything at the end (e.g. like the segment at the end of The Fast & The Furious). I might pause on the music credits if there was a track I was after or pause on the cast list if I wanted to check who an actor/actress was, but other than that, not interested - I just spin on. So I've voted for "Almost never, but sometimes I do". How about you?