I like a lot of different types of music, Rock, Oldies, Classical, little bit of Country, Soundtracks, etc.
I grew up with parents from the 50's, so as a child I ended up listening to a lot of the oldies. Elvis, Beach Boys, Ventures, Buddy Holly, Chuck Berry, Jerry Lee Lewis, ect., and I still like this type of music today.
My taste in Rock is generally a mish-mosh. I go more for the easy rock, such a Huey Lewis or ZZ Top, I don't consider them "hard rock". I have been known to "head bang" to a few hard rock tunes. The soundtrack to "Bill and Ted's Excellent Adventure" being a good example, even some Queen or Ozzy Osborne, all great music there by the way.
I also enjoy Classical music, often I would turn on the radio, lie back, close my eyes, and let the music of Bach, Chopin, Beethoven, Brahms, ect. wash over me. Now I don't quite get my fill, since the only classical radio station in town recently converted to another format. I really hate that! Seems every time I find a station I like, they either turn it into talk radio, or drastically change the music format.
Little bit of Country, whole lot of Rock & Roll. But I do find some Country acceptable. Songs such as "The Devil Went Down to Georgia", "Take This Job and Shove It", are a couple of good examples. I suppose my country music likes can be traced back to my father. He is heavily into CB's, Truck Drivers, Motorcycles, ect, thus I enjoy the music that generally comes with it. Heck, I still watch "Smokey and the Bandit" or "Convoy" and continue to enjoy 'em and the music. I also understand and follow most of the CB lingo, real helpful in my life of a computer geek.
As for soundtracks, I've probably got more soundtracks then anything else; often from musicals. I don't know why, but I really enjoy musicals, so I go out and get the soundtracks. From such movies as "My Fair Lady", "The Music Man", "Grease", and "Xanadu". Often I will see a movie where I just liked the music in general, and get that soundtrack. "Back to the Future", "Beetlejuice", "Ghostbusters", and "Star Wars" to name a few.
Currently I've been buying up, and listening to a lot of Weird Al stuff, most of his stuff is good, some I don't like but on the whole, what can I say, I like parodies.
As a general rule, I don't hold to one group or type of music, heck there are still disco songs I like today. I think it comes down to, if it sounds good to me, I'll listen to it.