A pet peeve: when I have been flat out at work all day, and a coworker calls to have a discussion that could have been a short text message, and spends a bunch of time on the phone when I am trying to wrap up.
Also, when people overcomplicate things. I wasted 15 minutes on the phone trying to figure out WTF the company owner wanted with his weird, circuitous request, and in the end, all that was needed was to know, "How much should we sell a refurbished X for?"
AY DIOS MIO. DOG HELP ME. I am getting grumpy in my advanced age.