>>10903767Overall, wear what you want.
Cosplays or coordinates do draw attention. Especially if your table has that specific fandom or you have some j-fashion stuff. People are probably not going to come up to you only because you're in a cosplay or j-fashion. They're going to look at your display first. What you're wearing can be a topic of discussion.
I would only wear a mask if you're concerned with getting sick or you're at the con and you feel a bug coming on. People aren't going to care about your face. They're going to care about your art and products. I find masks put a barrier between communication, simply because of audio processing issues and loud vendor halls. So I prefer to go without one unless it's a need. I keep masks stashed in my tabling supplies, but I honestly hate trying to communicate with customers while wearing them.