Caleb and I love listening to music from animes! And J-Pop. They are extremely catchy songs! That is awesome about learning Japanese. I'm jealous :)
I definitely hear you on Nickelback and Link Park. I enjoy listening to them every so often, but most people I know can't stand them anymore.
I like tons of music that I wouldn't admit to my friends. Avril Lavigne, Taylor Swift, Aqua, some Britney Spears, etc. None of those artists or groups are "hip" really, but I still enjoy them sometimes, if for the simple "guilty pleasure" of it.