Yeah, guilty pleasures blah blah open-mindedness, blah blah.
But, on topic: blink-182, Katy Perry, Avril Lavigne, and a bunch of musicals. Also more or less falls into that last one, but I've made no secret of my love for Disney movies & the music in them. Most days I'd rather drive and listen to, say, the Little Mermaid soundtrack than I would a metal band. Lot less likely to get a speeding ticket that way, too.