I'm a guy in my 40's. I enjoy playing RPGs and I think I'm pretty easy to get along with.
I have a headset, no pets or other background noises, and will use a variety of voice chat software.
I prefer consistency with whichever rules are being used. Of course, we're not robots, and all make errors. The rules of a game are important, because that's what makes it a game, instead of just 5 adults sitting down and telling stories. Both matter in an RPG.
I tend to do voices for my characters, but will try not to make them annoying. Let me know if it's bothersome.