I tip great at sit-down restaurants. I don't tip at fast food places, or carry-outs where they don't actually provide and service, or at the oil change place.
Summary: if I didn't tip in a situation 10 years ago, I'm not going to start now.
In the UK the sort-of rule is that you tip for 10% food if you pay after receiving it (and that's pretty much the only situation where anyone tips).
It seems like since the pandemic even that is less expected though, which is nice.
I tip my barista and budtender a dollar every visit, personally. I love those people though. Restaurants get 20% unless they fuck up, then it's 15%, unless it was absolutely egregious.
That's it. I cut my own hair.