Music you HATE the most but once you LOVED it

Used to be a huge KISS fan but now I'm down to listening to Dressed to Kill about twice a year and maybe Rock and Roll Over every other year. 

Used to be a Ted Nugent fan but good god I can't stand anything from him, can barely tolerate Great White Buffalo and that's a great tune!

My taste changed radically in 1969 (my teen-combo opened for The New Buffalo---the remnants of Buffalo Springfield. Watching and listening to Dewey Martin play my drumset, with Bobby's brother Randy Fuller on bass, I had an epiphany. Just like "THAT"---the timeless finger-snap---I now "got" The Band. Finally!). I'm embarrassed to name some of the stuff I loved before it did, but will anyway. Nothing as bad as, say, Blue Cheer (perhaps the worst Band of all-time), but not that different, really. Iron Butterfly (oy!), Vanilla Fudge (yee gads!), Cream even, and yes, Jimi Hendrix. Okay, abhor is too strong a term for him. But not the others.

Two categories that I like less:  artsy/psychedelic stuff like later Yes (think Topographic Oceans) or Strawberry Alarm Clock, Electric Prunes (yes, I had albums by both of those bands)
or rock bands recycling styles that were better done the first time, such as blues, bluegrass or earlier rock and roll.  Some Yardbirds and some Grateful Dead material comes to mind.  There's still a lot of stuff I like by both those bands.  In the blues category I have no problem with the original Fleetwood Mac.  I can still take Cream doing blues but I'd rather hear Cream doing SWLABR and Howling Wolf doing Spoonful, FWIW.

Also, I no longer like later Jefferson Airplane and Hot Tuna (with Papa John Creach) that I used to enjoy.  I still like the earlier stuff.

Hate? No!, Zero, Nada, Not a single One! Does it make me a spineless coelacanth? I guess. I never liked Fleetwood Mac, or Jefferson Airplane, or ELP, or Dylan and still don't listen to 'em (but have the albums) Loved Uriah Heep, TD, Deep Purple, still listen to them... sometimes... not very often... well, maybe once every few years ;-)
Listened to the Side B of Abbey Road non-stop 40 years ago, haven't pulled this new 180g LP out in years, never even bothered to break the seal on Beatles Japanese stereo CD box set. Does it make me a Hater? NO, i guess, I just do not care any more... Which is even worse, maybe

I got it! I hate it so much that I actually blocked it in my mind! 
Coldplay. 
Albums in my "garbage music" box, the guy actually fouled my love to "shoegazing" style. What a whore! 
I may be offending quite a few folks but, hey, you asked for Hate!...

I didn’t actually love these two guys, just liked them. But boy do I dislike them now. Elton John and Tom Petty.