I am not what you would call obvious. You would probably not know I am same sex attracted just by talking to me for a few minutes. Maybe after we got to know each other you would figure it out, but I'm thinking you'd say, "naw, that can't be".
I think the only time I ever looked kind of gay was when I was in a friend's wedding. The bride was my friend who knew of my SSA status and ask me to stand up with her and her hubby in the ceremony. I obviously could not be a bride's maid. Too much equipment. But the groom was kind enough to let me stand with the guys. We all had these white tuxes on. I was the only guy that looked gay. I was the sore thumb.