Well aside from the very easy answer here because I’m male and comfortable with female presentation so most likely my long hair, painted nails, or shaved legs etc., but I happen to have an unusual eye color and a bit of a piercing and observant gaze. In the past I’ve been told it can be a little unnerving, but I’ve worked to ensure it’s a bit more welcoming. That depends on how much I’m paying attention to it though.