I really like Outkast (particularly Andre 3000' stuff), which coming from a small farming town in Indiana, is kind of odd.
I also really like ABBA, the Darkness (while many think of them as a sort of 'joke' band, they're genuinely one of my favorite groups), and KISS is my favorite group (and they've always historically been sort of looked down upon by most 'respectable' music sources)
I also love Guns N' Roses' "Chinese Democracy" record. Although a lot of people were expecting Sweet Child O' Mine 2.0, I have to say that I thoroughly enjoyed Axl's new stuff.