Disco is one for me. In my younger days, when disco was new I hated disco. In the words of Brian Seltzer of the "Stray Cats" :
Well, we found a little place that really didn't look half bad
I had a whiskey on the rocks, and changed half a dollar for the jukebox
Well, I put a quarter right into that can
But all they played was music disco man
Come on, baby, baby, let's get out of here right away
These days I get a bit nostalgic when a Bee Gees song comes on the radio and I'll sing along. My younger self would not approve. Lord knows he'd be rolling his eye if ABBA or Duran Duran came on, as well.