I once had a college professor tell the class, when i asked him if some of his music choices were guilty pleasures, "i don't have any guilty pleasures, i listen to it, and i love them all." I thought that was one of the toughest things i ever heard.
That being said, i'm still working to get to that state, but sometimes i'll listen to some Air Supply, and I have both ABBA and The Carpenters on vinyl. I'll own The Carpenters, as Karen has the voice of a goddess, still working up the nerve to own up to the other two to people outside my circle. I guess sometimes you just need a break from your normal listening habits.