Many kinds.
I like older rock, country from before the 2010's, and a couple of the newer songs; I like a bit of classical music, too; I listen to some Vocaloid songs, but not very many; I like some Japanese songs; instrumentals are nice; I probably listen to video game music the most, from all across a bunch of franchises -- Final Fantasy Crystal Chronicles, Tales of Symphonia, The Legend of Zelda, Mario, Kirby, Halo, and a few other miscellaneous pieces from here and there.
I'm probably missing some.
I don't like rap or hip-hop. Haven't listened to pop, either.
Oh, and some really old songs from the fifties and that general era are good, too.