Back in the day, my internet persona was more gender neutral. Then one day I decided to just identify as male in order to help with some gender dysphoria I was dealing with. But then I realized I liked being addressed as male more than female. I don't really get misgendered online nowadays due to my user name. I don't like to talk about gender too often on social media, so no one really questions it too much.
When it comes to interacting with other people, I have a bad habit of calling genderless/unknown gender people "he". I have gotten better at this.
As for my characters, I don't really care. I like having character who look or act androgynous, so then maybe being misgendered might happen, I guess.