So what are some of the etiquette rules for economy travel?
As far as I am concerned the person in the center seat always gets priority for both armrests.
Window seat has the advantage of being able to lean on the side of the plane which gives them more room and they have full use of one arm rest.
Aisle seat has a bit more room on the Aisle side and its easier for them to get up and move around, they also have full use of one arm rest.
For a more direct explanation see what Jim Jefferies has to say.
Keep your hair on your side of the headrest, not over the back.
I don’t have any problem if people take their shoes off as long as they keep them on the floor.
I won’t be happy if you then put them on the seat next to me or push them through to the seat in front of you.
Travel Hack – Put your shoes back on if you go to the toilet, that wet patch on the floor isn’t water.