Ok, I think I could be Raven's dad . . . here goes:

Desert Island Stuff (not in order):

Jethro Tull - Thick as a Brick & A Passion Play and the rest
Peter Gabriel - everything
Beethoven's Symphonies
Phil Keaggy - Beyond Nature
Stevie Wonder - Songs in the Key of Life
King Crimson - everything
Mel Torme - anything
Cat Stevens - most all of it
The Who - Quadrophenia
Pink Floyd - Early years before DSOM
Van Morrison - Avalon Sunset
Beatles

agree with farhad, on the difficulty, and for the most part on the groups he chose. That's why I tried to go for essentials rather than favourites... as for my desert island picks..

portishead
j.s. bach
astral projection
shpongle
richie hawtin

come to mind right away.... i don't know... more thought required....