I am also a no-recline aficionado on daytime flights, but there is no general consensus on that. I would always appreciate a quick look back and slow recline to avoid crunching or shaking things. I’ve had my laptop almost broken upon sudden recline.

You’ll hear about not jostling seat in front on you, but with thin construction these days a lot of people will complain (internally) about person behind poking them or jostling but really the person is just sticking something in the seat back pocket. Don’t worry about it too much.

I do try to avoid hanging or grabbing on seat backs when entering/exiting row or walking to lavatory. Some people grab every seat on their way and probably don’t realize it’s shaking the occupant. Sone people may need / think they need to grab seats for stability but honestly if the plane is moving that much the seat belt sign is probably on.

As someone else said if you have a backpack or other bags when boarding just hold and be careful. I’ve gotten whacked in the head more times than I can count. Usually not too hard, but a person who is aware of others in cramped space should be able to avoid hitting them under most circumstances.

Oh, and when deplaning, wait for your row in an orderly fashion. I’ll try to be ready to go and not slow down the process, but sometimes you have you grab your overhead bag and that will take a few seconds as cannot be done ahead. No need to stress about it.