Least favorite genre of music...

I tend to know a lot of friends who dislike/hate classical music but I don't really mind it.
What I detest is opera, I mean any kind of opera. Simply hearing it literally makes my head wanna explode...

What genre of music do you hate? Discuss.

Generic music?>
I mean if you look there is good stuff in every genre I've heard.
I used to think Rap and Country sucked.
I found out that only the Rap and Country on the RADIO suck
The local folk and hillbilly and rap and hip-hop can be pretty damn decent.
...
...
Wait- Whatever genre ICP is in I hate.
So much.
So so so so so so much.