I could not make a list like @simonmoon of the musical attributes that appeal to me.
Szymanowski’s Symphonie Concertante. It sounded "experimental" enough (although probably a hundred years old) to be on @simonmoon’s list. Do you know this composer?
Let me be clear, I did not consciously choose to only like music with the attributes I listed previously. I didn't create that list with intent to only only listen to music with those attributes.
I just noticed over time, that music that did not have most or all of those attributes became less and less interesting to me, and my tastes and search for new music kept heading toward those attributes.
I have several recordings by Szymanowski that I like quite a bit.
Those criteria I previously mentioned:
Those criteria being (no particular order): very high level of musicianship, deep and broad levels of emotional and/or intellectual content conveyed, fairly high levels of complexity and sophistication, (usually) long form song structure that goes through changes in: mood, intensity, tempo, dynamics, time changes, etc., over its length.