I have never actually taken the time to listen. Any tracks one would recommend to start with?
Zappa? Well I could give you a few of his accessible songs. But to truly experience Zappa's music, I think you should listen to full albums.
Flakes: One of my fave songs of his.
Inca Roads: Brilliant song. Though you may find it a little too long, it's enjoyable nonetheless.
Camarillo Brillo: Just a nice chilled out song about sex n stuff.
I listen to everything that grabs my attention, irrespective of the style of music. From ambient and classical music to metal and avant-garde.
Do you have a Last FM account?