Hm whenever people came up to me and the first few second on their expressions I get from just reading them, is either unsure or what it may seems like I’m unapproachable. But by the time I open my mouth to greet with a handshake, I can tell they become comfortable around me. So I can appear as “brick wall” but I’m actually a nice guy. In retrospect, in personality I appears as stern or businesslike. But once you get to know me, I’m not all that 24/7.