Well, there are some evergreen classics like people barely acknowledging your existence when you're serving them/running them through the checkout (I love when I say "hello/good morning" and they just shove a coupon at me wordlessly), people taking out their anger over pricing/selection/whatever on me the minimum wage employee who personally sets the prices and dictates company policy (/s), getting mad at me for it being busy/having to stand in line when we're (almost always) understaffed since corporate is slashing hours, or people asserting that they have been given military discounts or other deals before when the location has never offered that (one of my few pleasures is making guys with military IDs pay full price, makes me smile inside every time).

Then there are the rarer ones, like running an errand in my uniform after work (different store, different uniform color) and being accosted by people demanding my help. I had to explain to someone that no, I didn't work at this hardware store, I just got off work and haven't had time to change. That's happened to me twice, separate jobs and separate uniforms.

Or the time I was working at a theatre in highschool and a guy started chucking 3d glasses at me for politely asking him to stop holding up the line with small talk after buying his tickets.

Then there's the time at the same job where the same fucking person puked in the bathroom sink three fucking times over the course of the same night. He passed at least two garbage cans and was two steps from the toilets. I will not go into how I knew it was the same person other than saying the "samples" were consistent with each other. I was the one who cleaned it since I was 18 at the time and the manager was a piece of shit who wasn't going to do it

There are times I really miss working where I didn't have to deal with people