I can't stand Hip Hop, R&B, Dance, and all sorts of genres like that.
With that aside, I simply can't stand most of Fall Out Boy's songs.
Anything by Coldplay, Oasis, Greenday, Fall Out Boy, Panic! At The Disco, HIM (I know. I know. They're finnish ) and any rap songs.
I especially hated the songs by some guy called 'Mario'. Oh god they made me shudder.