I'm honest... I Pre-Judge people all the time based on some of the stupidest stuff ever; Race, Religion, Gender, Age, MBTI, Fashion, Hair, Walk, Political Philosophy, Accent, Nationality, et cetera.
I also judge people on their handshake, I cannot stand weak handshakes. I grew up with an SJ father, in an SJ nation, firm handshakes make firm personalities. As anyone will tell you, my personality is mercurial rather than firm. Hell, if you're too firm then you cannot change with the times, or if necessary, the instant. However I like the illusion of being normal occasionally, so I keep my handshakes firm, and my eye contact solid.
I judge people on their handshake, and all sorts of other things, hell, everyone does "Negro? OMIGOD! MUGGER! RAPIST! DRUG DEALER!", "Asian? Quiet and smart, Martial artist! Don't start anything or he'll bruce lee me!", "Aboriginal? Breathe through the mouth, the MOUTH damnit, where's that deodorant? God he'll probably want money and cigarettes.". The trick is to not be influenced by prejudice. Unfortunately if someone gives me a bad handshake I start wondering what they have against me...