Okay - I know I'm the resident music geek around here so I'll just list a few of my favorites
Opera: anything by Vivaldi, Puchini, Strauss, Mozart and a little Wagner. There are a few other composers who have had the occasional good opera, but by and large, those are my favorites.
Vocal: Carmina Burana by Carl Orff is by far and a way one of my all time favorite pieces. I have a fabulous recording with Harken Hagegard as the baritone - just tremendous. I love German Leidsong (Schubert, Schumann, Wolf) and my favorite recordings of that are by (no surprise) Fredrich Fischer-Dieskau accompanied by Gerald Moore - truly the height of tallent with Leid. If you haven't heard it - you're missing out.
Instrumental: I am a big fan of Aaron Copland, Beethoven, Bach, some Mozart, and a bunch more that I don't have time to list and you might never have heard of. I'm especially prone to 20th century music (Stravinsky being a big favorite) - and a lot of the atonal stuff. I appreciate the level of tallent it takes to pull that stuff off successfully, so I listen more with a sense of awe at the artistic element. Don't give me John Cage though - not very enjoyable stuff. Philip Glass is also on my yuck list.
"Normal" music: I listen to just about anything except for hard rock, acid punk and country music in any form (it grates on my nerves like fingernails on a chalkboard - just atrocious to me). I don't own many CDs that arent classical in nature, although I am in possession of almost the full Billy Joel collection, and most of Bruce Hornsby's albums as well. I am partial to new age (especially if it's in the vein of neo-impressionism) and jazz (smooth, classical, swing, all of it).
Radio: I listen to 96.9, 101.5, 101.1, 95.5, 89.5, and a few others on a less frequent basis - whichever one isn't playing a commercial at the time.
There - that about does it. I think this post is now longer than Joe's compilation post.
I am one long winded dude. Take your best shot Hoolie

'Weird is a relative, not an absolute.' - A. Einstein