Noises that get me:

chewing
biting into crunching food
hearing someone swallow (OMG!)
heaving breathing
high pitched sneezing or coughing
high pitched noises in general!
someone clearing their throat ALL the time
kids crying/yelling in stores or restaurants (I get angry at the parent for this, for not taking them out)
crinkling envelopes
plastic bags
paper bags
gum popping or smacking (OMG)
when people smack their food when they eat
hearing someone eating nuts

Oh the horror!