People who think it's OK to run and push others out of the way because it's raining, and/or to catch a bus or train.
People who get angry if I don't let them in after me as I enter the office. This is at a company that's about to have a major ISO inspection, and where security has recently been tightened because of a burglary. If you work here, you know this; and have, like me, been warned over and over again not to let unknown people into the building. If you don't work here, you should be using the main entrance, where security will help you (and there's a notice reminding you of that!)
The assumption that, in any work of fiction, any woman aged between 13-60 needs to fall in love and/or have a child; purely because she is female. Especially cringeworthy when done in series based around someone's profession (police / legal procedurals, medical dramas, etc.) where a high-powered woman will hit 35 or 40 or 50 and panic that she's left it too late to get married or have a baby! Thereafter, this will be the focus of her character and it will be done in such a heavy-handed and poorly written way. I seem to remember one of the characters in House had this ...
The train guard who shouted at me and threatened to have me prosecuted because I couldn't find my season pass - which I did have with me, and eventually found. I wasn't raising my voice or being rude. I said calmly that if I couldn't find the pass in my bag I would buy another ticket; and he started shouting about fare evasion and prosecution because "I saw you get on the train early! You had plenty of time to buy a ticket!" I believe he thought that, if he made a scene, I would be "embarrassed" in front of the packed train carriage and would give in and pay a penalty fare. He was embarrassing himself more than anyone else.
Rain and people who gush about loving rain. There's nothing to love. I want to move to California; a friend who lives there described it as being like living in a simulation where the weather is the same all year round: warm and sunny with little variation. I don't know if that's true, but it certainly sounds nice ...