Depends on the people who judge. My friends know me more than anyone really, I've known a lot of them since I was 11, one or two even before that -- we know each other inside out and even though as of late I have been moving away from them, we still hang out. To be honest a lot of other people judge me on my friend group. My friends aren't the nicest people in the world and I will admit that, a couple being the so called "toughest" in school. That's the sort of reputation I get, people sometimes judge me based on this, a lot tend to be reluctant to talk to me, when reality is that I'm probably one of the most laid back and friendliest people.
Sometimes it annoys me a lot, I like to talk to a lot of people, I don't care about social dynamics or hierarchies, I can generally get along with most people and I think that's one of my best traits, but it can also be my downfall in a way. So yeah that probably one misconception about me and it's not even about people judging me, but instead judging who I hang around with.
Another thing would probably because I'm quite common, as in my accent. I don't live right in the city or on the outskirts but I was born there and my most of my family were born there. So I do have quite a "common" accent. Now I go to college were we have a lot of different types of people (I've left now), but a lot judged many of us on our accents and whatnot. This kind of links into my above point as well, but after a few months a lot of people realised the kind of guy I was and now I speak to most people.
A bigger problem linking into my above point, would be when searching for jobs. Now city jobs are very rare so you have to expand your search somewhat. A lot of times in interviews I feel like I get judged on my accent, that should not be the case in my opinion. I'm not perfect but people often judge me on this, when in fact I'm rather intelligent, friendly, outgoing and I have a good sense of humour.