Dunno about percentage really... mostly listen to chillout, I'd say roughly 80% is chill... 15% is alternative such as Muse, Red Hot Chili Peppers or general rock.. Like Dire Straits etc... Then 3% is psytrance, but only for classic albums - Twisted, B.P Empire... 2% is the other crap I might get forced to listen to occasionally.
Check out my Discogs (sig), it's pretty complete.