Okay, I'm in. Things that annoy me:
I have a very young sounding voice. Too many times when I'm on the phone, the other person treats me like a little girl. "Sweetie," "Hon," "Honey," (ugh, I'm not your sweetie or hon or honey) and they just don't take me seriously. Even when I try to sound firm.
Calling a toll-free number and getting the run-around by a computer. And when I push "0" several times (it used to let you get through to a human), it just says, "I don't understand, please try again later. Good-bye." Click.
Being too short to reach the high-up shelves in a supermarket where someone on a step-stool or a tall person stacked the boxes (or cans) too high and I have to stand on a lower shelf to reach up and pray I don't get killed by the cans or smoothered by the deluge of boxes on my head.
And, oh yeah, what Don said: people on their cell phones talking really loud. Do they really think they're that important or what?