I'm 6'1" and have a medium build. For reasons somewhat lost on me, people don't seem very interested in messing with me. Both of my boys claim that I have some kind of death stare. :) Other people claim that I give off some kind of personna that makes "strangers" uncomfortable. Who knows? There is something to it, I'm certain, but I wouldn't bet my life on it. Situational awareness is ultimately the most important. I give off a little indifference. I don't think that's all bad. I've been afraid, but wonder if anyone had a hint of it.