You are so right, Abriael my friend!
For me, a good community member is someone who is friendly to all, helps when they can without asking or receiving anything in return; keeps a positive outlook on things and tries to diffuse rough situations when other players might get mean or snarky. Someone who leads by example (ie. if you don't want to see asshats in game, don't be one etc), must be willing to guide and advise others so that they may become better players (and I don't mean "Do this or you're a n00b!" elitism XD haha)
I can't really think of anything else.... @_@ lol.
Have a wonderful day everyone!