There are tons of things that piss me off, but the only things that come to mind are
a. People making a big deal about something I don't consider to be that big of a deal.
b. People who don't know how to drive or the laws of driving.
c. When someone opens my door when it's completely closed and doesn't close it on the way out. OR WORSE when someone closes it, but leaves that crack where it's not actually closed. UGH!! That alone makes me want to dropkick someone right in the mouth.