
Just realized this on my most recent rewatch.
So I’m watching the opening of the water scroll episode when I noticed when the gaang are all sleeping Katara and Sokka have a sleeping bag which seemed to be made with some sort of fur or hide. Aang being a pacifist and vegetarian would most likely find this repulsive and chooses rather to sleep on a pile of straw. Just found this as an interesting little detail show his character, and how truly dedicated he is to not harming life. (except for that one buzzard wasp)
Edit: as some people have pointed out, Aang is shown to eat egg custard tart meaning he is not actually a vegan but a vegetarian. I apologize for my mistake although I feel my point still stands.