I like to believe that everyone is judgmental in their own way. Some might deny it, but think about it. Have you ever asked someone what their favorite food or drink is, and after they respond, you say 'ew' or something to that effect? Even something as subtle as that is being judgmental, as you're showing your disfavor to their opinion.
I do things like this pretty often, though I don't go as far as judging someone's appearance, personality, or political/religious/ethical beliefs, as everyone is different in their own respect and I can't change that, so forcing my opinion on them does more harm than good, if anything at all. I try to be as subtle as possible but it's going to happen so I don't try to stop it.