Being rude to service staff. Immediate indicator on who they are as a person. There is zero reason to ever be mad at someone making near minimum wage whose job it is to grab you a drink or check you out or something. It also shows that they've themselves never worked service, which is a rite of passage
queer phobic. I'm not queer but many of my friends are. I don't need that negativity in my life.
smoker. Maybe a pass if they are actively trying to quit. Maybe. Most active smokers I've known have kind of been assholes about it, though.
littering. Sometimes combined with the above when smokers throw their butts on the ground
being a jerk about people having healthy hobbies. Like, just let someone enjoy some video games or bird watching or whatever. I can't with people who are like "omg that's so childish you still [play games/read fiction/go to the zoo/whatever]?".
being anti-consent. I've met a few women who are like "just do stuff and I'll tell you if I don't like it" and I'm like lady there's some "stuff" that can be done that by the time it's happening , the damage is done. Let's just have a conversation about what we like and what our boundaries are.
Rudeness to cashiers, wait staff, housekeepers, children or elderly people. If you are mean or rude to these people I assume you think you matter more based on social standing, and can't be bothered to even be polite. At that point I don't care if you are nice to me.
being mean to animals, not washing hands habitually, littering, leaving the shopping cart out, buzz cut / crew cut and variations thereof (for dudes, some chicks can rock it), having no weird behaviors at all. refusal to be emotionally honest (oh no, its me i'm sorry)
Someone that takes abstract statements personally and responds in anger. It shows a lack of self awareness and depth. It also implies that they have a limited binary view of the world around them; a bipolar me versus others perspective outlook.
I've ended a relationship because the girl drove like an impatient bafoon. If you have a superiority complex about a speed limit in residential areas, I'll sit in the passenger seat railing about how you're such a shit driver. Just drive the speed limit and gently.
Everybody's already mentioned the important things, but to be the more superficial one: people with no sense of style. People who just throw on something randomly and don't give it a single thought. I get being comfortable, but you can be stylish and comfortable. You are not that when you wear knee-long jeans shorts and an unwashed tee, in my opinion.
Talking over the top of me. If what you have to say is so much more interesting that what I was already saying, maybe you should be saying it to a paying audience somewhere else.
Lack of interest, like they're just waiting their turn to talk about what they want to talk about and not actually listening to me.
The other big one off the top of my head is not liking any animals. I get most people eat them, but if you straight up don't like anyone else you're kinda scary. No thank you.
People who this is targeted at and don't get it when you explain it.
Unless you have investigated a problem, you will be deprived of the right to speak on it. Isn't that too harsh? Not in the least. When you have not probed into a problem, into the present facts and its past history, and know nothing of its essentials, whatever you say about it will undoubtedly be nonsense. Talking nonsense solves no problems, as everyone knows, so why is it unjust to deprive you of the right to speak? Quite a few comrades always keep their eyes shut and talk nonsense, and for a Communist that is disgraceful. How can a Communist keep his eyes shut and talk nonsense?