Music you Hated but now Love

let me counter-balance the other thread: is there any music you totally hated but now Love?
my story: Gong, Magma, Robert Wyatt: I could not understand how my little brother could listen to this garbage, but now, 30 years later, these are in constant rotation on my LP12...
(((Please use another thread for Classical music, actually, Please, someone, start such thread for Classical!)))
Back in college, my roommate dug NIN ("Turn that crap OFF!") Now, I see that some of that older NIN was brilliant.
I'm with Erik. No Phish or any "jam bands" I like songs with a beginning, a middle and an end.
At first I did not like Steve Earle, then I did, but his later stuff puts me back to don't care for it.