I don't really agree with the term 'guilty pleasure' either, because it just means you are classifying things by genre instead of by good and bad. If you go oh I don't listen to x genre of music then you might miss out on one great song you would love even if you hate all other music of that type. It's just the way people with unskilled ears classify music in my opinion. It also shows music is more about image to you than it is about art. Which is why a lot of people with this kind of view only care to listen to manufactured, autotuned stuff. I like my own fair share of that stuff (One Direction is as close to a guilty pleasure as I probably have, but I only like, like 2 of their songs anyway). And I would have to say as a whole I dislike techno and dubstep, but that's not to say I would dismiss it entirely.
Other artists I'm less comfortable liking include Coldplay: I for years tried so hard not to like them because they're annoying and whiny, but they're also good. So whatever. I'm out of the Coldplay closet. I can't really think of anything else though. I'm proud I like all sorts of music- metal, country, pop punk, rock'n'roll...