One of my colleagues is dealing with a plagiarism case, and we were talking the other day about how much energy it saps from you to deal with plagiarism. There's plenty of time in tracking things down, making sure you're doing the process correctly, making sure you know the ins and outs of the rules, talking it through with the chair and contacting deanlings. But beyond that, it just saps energy.
To a lesser extent, students who want to get all legalistic sap energy. You know the ones, the ones who stop in to see why they "lost" a point and didn't get that B they really think they deserved, when they got what you (the instructor) sees as a generous C. Just thinking about those students saps my energy.
I find the same sapping when deanlings want to come to meetings and talk at us about whatever it is they think is really important. For example, we have one deanling who, whenever he's explaining anything about advising, wants to start with pre-admission test scores and HS class standing as indicators of college success. And I just die inside, and want to get him to actually understand that we don't do admissions, so we don't care about those indicators; we care about the human being we're trying to teach or advise. We teach and advise any student who enters our class or office, because that's the way the university is set up.
What work stuff saps your energy?