Rammstein is awesome.
(Weren't they working on a new album or something?)
Hmm, for me, I organize my music: Japanese (98% of which is Ayu), Italian and German. The rest is mostly video game stuff.
As for genres, it's almost all Electronica/Dance category if not foreign pop (but even that is considered dance sometimes too). Top 3 artists! Ayumi Hamasaki --> Eiffel 65 --> Blümchen
Oh yeah, I'm also into classical, new age/chillout, and rock sometimes.