Pet peeves list:
-Someone calls me, or answers the phone when I ring, then talks to someone else in the background. If I have to devote 100% of my attention to person on the line, the least they can do is extend that same courtesy. I will hang up if necessary.
-Clicking on a link that doesn't open in a new window, forcing me to have to use the back button, then option-click link...I changed my internet settings for this. Seriously annoying.
-People who are perpetually late to everything.
(Will add more as they arise)