Everyone's got a band or two they like that most other people go "OMFG EWW" at.
So name yours!
So I'll go first. I happen to like some Creed songs. The majority of what's played on the radio by them totally sucks, and I loathe Scott Stapp with a passion, but some of their songs were pretty good. I also think Avenged Sevenfold is alright, but that topic has been beaten to death in another topic directly about the band. The only other thing on my playlist that's not exactly the kind of stuff I usually listen to but happen to like a lot is some Lenny Kravitz. The guy has some great songs.
ADDITIONAL INFO:
I would like to say, to everyone that has said something along the lines of "there are no guilty musical pleasures", that you best never, ever, ever make fun of something that another person likes. You cannot ever think a band is too popular for their own good / too popular for the talent they actually have, that there is no such thing as degenerate music, and that there are no social stigmas attatched to listening to a certain form of music or band.
There is too such a thing as a guilty musical pleasure, because people will try and make you feel bad for something that you like. I really hope what you're trying to say (and everyone else who has said something along those lines) is that you shouldn't let other people's notions of what is worthy to like and what is supposed to be hated should not bother you. That's a valid point. Saying that there is no such thing as a guilty musical pleasure, whether a person actually feels guilty or not, is fallacy.