1.) Men in cardigans or turtlenecks. (Or both, I guess, but that sort of nasty is something that I can't even entertain in my mind without vomiting a little.) The bastard step sibling of these is, of course, the sweater vest. Sorry, fellas...it just looks wrong. Old Navy commercials are lying to you - men do not, under any circumstances, need a cardigan.
2.) White suits. They just scream "I'm trying really hard to get attention!" I've never seen one that looks effortless.
3.) Waking in the middle of the night to my cat messing with...something. I may cut off her paws.