My character name is a female name. My character is female. Yet I still get people calling me "he" in chat every time.

Not only is the assumption that I apparently "must" be a guy rather insulting, but it's also kind of a painful one. I'm a trans woman. Being called "he" really hurts, and playing a female character with a female name should be sufficient to get gendered as female. And if people aren't sure they could at least ask.

Pretty much the only thing I could do about this beyond what I have already is start off every party with, "By the way, I'm a girl." Not only does it feel obnoxious and tedious to have to do, but I'm well aware of how many in the gaming community react to someone being visibly female.

But overall? If you can't be bothered to ask, please just gender based on avatar. It's far simpler and less insulting than assuming every player is a guy.