Good to see that there's still folks who are serious about their music.
My vote was for "Rock". Pretty broad category. To narrow it a little, I like what we Americans would call Classic Rock. Still pretty broad, goes from Pink Floyd to .38 Special, from Jethro Tull to AC/DC. Since I'm actually a couple years older than Mick Jagger, I'm probably no more likely to change my preferences now than he is.
Having said that, must admit that every now and then I accidentally hear something from another genre that really blows me away. Case in point, the group "Live" who I guess would be considered Alternative Rock(?). Anyway, great group and I truly like their stuff. A good example is this version of "Lightning Crashes" on YouTube. If at all possible, give it a look/listen.
http://www.youtube.com/watch?v=--QBj4OyAaM
For those of you who'd like to "broaden your horizons" based on what you already like, you might want to check out Pandora â€"
http://www.pandora.com
The site is very interesting…you ‘seed’ it with a song or artist you like, and it then plays songs similar in style. Their secret sauce is the Music Genome Project, a team of actual professional and semi-professional musicians who ‘tag’ songs â€" it’s not based on the record industry genres or classification at all. The tags they use are very detailed, including stuff like: strong male vocals, minor key chord progressions, varied dynamics, story-telling lyrics, prominent drums, etc. You add as many seeds as you like, and they find stuff that has similarities. It's almost impossible to objectify something that's so inherently subjective so it’s not perfect, and you will definitely find stuff you do NOT like, but it’s a pretty new and innovative way to explore music. Check it out.