If asked, I'd say I listen to Clasical music - but in truth almost everything I listen to is from the last 50 years or so. Not that I don't like some Bach every now and again, but the real excitement for me is in contemporary works. Commontl heard in my home: Stockhausen, RIley, All and sundry Kronos Quartet, Feldman, Vasks, Goreki, John Adams, Glass, Reich, John Luther Adams, , Xanekis, Andriesson, Sundry Bang on a Can, Pendereki, Cage etc. Among others.
Much of this is in keeping with my jazz interests, which tend to veer away from what I'll call "Blue Note" into avant garde. I like music to challenge me, to make me think and work at it. I tend not to enjoy "obvious" work (obvious as defined arbitrarily by me, )
I consider Music for 18 musicians as my favorite piece, though I more often play the longer Nonesuch release than the ECM.
This is a nice thread.