I hate it when someone's humming or whistling as they walk. Especially in the skywalk on my way to work - it just echoes annoyingly.
Add me to the feethating bandwagon. The exception is my kids' feet. I wuvs them and try to snack on them at every opportunity. My 2 year old wears "mommy shields" i.e. socks.
I hate it when people use cell phones in theaters, period. To text, to read a text, to check the time - it's all very distracting to me. Any light in my field of vision draws my attention away from the screen. It's gotten to the point where we rarely go to movies any more (well, also that it costs us $30 in babysitting fees...)
I hate it when someone uses the microwave and doesn't clear the timer if they take their stuff out before it's done counting down =\
I used to really hate to be touched but since having children I've gotten over it. It's hard to hate it when someone's clinging to you 99% of the time LOL
I hate it when people are famous for being famous - Paris Hilton, Kim Kardashian, Nicole Richie, etc.
People who speed or drive badly drive me crazy. We drive the speed limimt and follow traffic rules because we have two small children in the car and if anything happened to them, I would die. Literally die. So when someone whips around me and honks or whatever, or cuts me off, or almost hits me, it sends me into a state of near panic.
There used to be more, but I'm on Zoloft now