My interests range from science fiction and fantasy to history, UFOs, crop circles, urban folklore and ghosts of all kinds. Babylon 5', 'The X-Files'come in at close seconds. Mostly, however, depending on the mood I am in, I listen to folk music. By alternative, I mean the occasional group that most people don't know much about. For instance, one of the few rock groups that I really enjoy is Big Country out of Scotland.
Dance is good music for driving on fast roads.
For slower traffic, I have found that folk and sometimes country works best. One of my favorite past-times is to mix my own tapes and then play them to death. Good classical music, especially stuff with full orchestra behind it, is a relaxing way to think. I really enjoy listening to movie scores. A lot of local authors, artists, guests and fans attend every year.