Heath Ledger in The Dark Knight - he was a great actor, he was good as the Joker, but not that good.
Bacon - it's all over the Internet, it's become a meme, and I just hate it.
Hamburger + fries - I could never understand why people eat those two things together. Can't imagine eating bread with potatoes.
Paris - I liked it well enough, but I'd never go as far as calling it "the city of love/light" or "the greatest city in the world", as many people do. I was actually a little disappointed when I first saw it as it is hugely overhyped.
Twilight/Stephanie Whatsherface - no comment necessary.
(Sorry to go off topic, but someone mentioned Kirsten Stewart, which made me remember that I was browsing very old threads and seemed to come across her profile on the forum. Was she really a member? She seemed unhinged )