I like some of everything, but have a strong preference for stringed instruments or electronic music. I also like very emotional music (but only if it's done well- a lot of the time it comes across as Narm). ex: I don't like most of Katy Perry's stuff, but I do like her E.T. song. I also prefer classic country to the newer musicians- they didn't sing "I love God because he gave me this family, in America" version 97245 or "Attempt to sound like pop" version 7367.
My current top four musicians, disincluding those who are based on some fandom or other:
Voltaire
Globus
Laki Mera
Lonely Island
I still have a soft place in my heart for Britney Spears, Backstreet Boys, Spice Girls, and all those other cheesy late 90's/early 00's singers, despite not really liking anything similar that's come out recently (what can I say? they came out when I was in elementary and middle school. Happy nostalgic memories all around).