On many peoples mp3 player (or music playing device) there are often a few tracks that you would rather the world did not know you listened to. Unfortunately these things have a way of getting out. Perhaps your soundproof earphones are not that insulated and the rest of the bus now knows that you listened to B*witched or Bad Boys Inc.
All are that persons deeply held musical taste which they have often taken the time to rip and copy to their mp3 iJukebox thingy. What I do dislike is being sneering or ironic about it (especially those awful "ironic" cover versions that bands do on the Jo Wiley show), describing it as a guilty pleasure. It is used to legitimise poor works or as an apology for liking unfashionable works. The phrase pops up frequently on Lastfm among many other lazy or poor tags ( .
If you like it you like it you shouldn't have to coat it layers of irony and pretend its really bad. The choice of music is a deeply personal thing, the statistics on my own player have the kind of bands certain Radio 1 dj's claim give you good taste and those which don't.
I would like to see under my totalitarian rule the phrase "guilty pleasure" banned (along with "journey"). Something is merely a pleasure or not. We can all name several films that are well made and beautifully crafted but we'll all get loads more fun watching George Of The Jungle (watch out for that tree!).