Everything.
Except country and a lot of trending artists.

To be more specific though

The Pillows, Dir en Gray, Miyavi, Lm.C, Spitz, Yoko Kano, Halestorm, Marlon Roudette, Coldplay, Florence and the Machine, Sia Furler, Nomak, DJ Okawari, Nujabes, Abstract Rude, Haiku D'etat, Sublime, Stone Sour, Evans Blue, Avenged Sevenfold, Rise Against, ICP, Twiztid, Dark Lotus, Potluck, MGMT, Cypress Hill, Kottonmouth Kings, Neon Indian, Disturbed, Imogen Heap, Egypt Central, Foo Fighters, ACDC, Boston, Blue Oyster Cult, Blue October, Gackt, Egypt Central, Black Veil Brides, Machina Supremacy, Vivaldi, Mozart, Beethoven, Enya... I have music for all of them in my music folder
... and a bunch of game and movie soundtracks
And a Dubstep folder and on Youtube playlists for violin, dance mixes (french, italian and persian) andd progressive, trance and techno and German Industrial dj Grendel...
yeah.

I love music...
almost all music
unless it sounds horrid