I think the most thing that annoys me is when people make me repeat myself over and over. After I've said it 5 times, I then get in trouble especially from my parents for "Having an attitude.."
I think what annoys me the most is when people tell me how to do something even though I do it all the time.
That and when people leave their crying babies in their shopping cart and walk off to get something, while the baby is their crying and flailing their arms all over the place. Ugh.
Mainly impatient and rude people who lack empathy and patience for others as well as lacking in manners. Its intolerable.
Rejection. People not giving me the chance although I suppose that is understandable to be misjudged as that is human nature. It's a pain, but I suppose it takes some getting used to.