Jane Lake and Promptness
I don't have a lot of pet peeves, but I hate when someone is late, especially when it is their pattern. People always have an excuse. "I got stuck in traffic". "My kids wouldn't cooperate." "I got lost."
But the bottom line is that if you are cognizant of the time you will not be late. I can't remember the last time I was late for something. It is rude and inconsiderate. I know a lot of people that just prefer someone else to wait rather than themselves. Or people brag that they don't wear a watch like they are special.
Patience may be a virtue, but promptness is, in my mind, a badge of honor, and one that too few people wear.