I'll stir the pot. While I have nothing against rock-n-roll (I listen to a lot of classic rock)...
I listen to a lot of country western music...
but I love relaxing to this kind of stuff:http://www.youtube.com/watch?v=Fr17zNZFg0Y
can't argue with talent. it may not be your pint of beer, but you all should have an appreciation of choral/orchestral work.
this is actually what I prefer to listen to while brewing.
a bit of background helps though... I am a cellist and my wife is a harpist.
this too: http://www.youtube.com/watch?v=-XM9nA6zUpE
man, it gets me through the day.