Atmosphere's when life gives you gold, you paint that shit gold album. I find it vary nice when you are lurking forums, *chans, and IRCs.
I like DJ SHARPNEL, and also lots of other "otaku" music, like touhou and lolicore and j-noise and just random crap that comes out of Akihabara.
NOTHING BUT METAL.
Porno music because I'm watching porn constantly.
Vocaloid & NND singer covers
Devo
I listen to a lot of Beatmania IIDX music when lurking forums, *Chans and suchlike. Particularly RED ZONE and the countless remixes of it made by nico nico douga users.
EXIT TRANCE PRESENTS SPEED アニメトランス soundtracks, there are nine of them so far and they all have hardcore/speed trance remixes of anime Openings/Endings, and a few image songs.
metal sucks, you faggot