Personally, I don't really believe in guilty pleasures. If you like it, you like it. I don't like everything my friends like and I don't expect them to like everything I like. Do I listen to things that friends of mine think is crap? Sure. Am I embarassed because of it? Hell no.

I enjoy quite a few of those listed in your post, guiltfree. I listen to Appetite for Destruction, which rocks like a mf, Dookie once in a while, great example of modern style pop punk, and that Kid Rock disc. I haven't gotten too much into what else he's done, but I really think that was a heck of an album. If I had it, I'd pull out that Beastie Boys disc too.

Kinda hard for me to think of anything I like that I would find emabarassing. I basically have no shame.