I sometimes have caught myself by judging a fresh met persons mainly by their outer appearance.
You look at someone by the first encounter and you talk to yourself "Oh, that person seems to be so nice, handsome, so velvet voice...and so on."
But in the long run they prove to be of no value or even little bastards capable of everything.

So how is it with this "face value" assessment? Why are we often so wrong with our judgement?