The saying that there are two sides to every story is true on so many levels. Throughout life you grow as an individual, and part of growth means outgrowing individuals. To many people I am an incredible young woman who has their head on straight and is extremely loving and respectful. To a few people, I am, to put it simply, a "brat".
For some time I would be annoyed by the second set of people, because I am far from spoiled, and I do not consider myself to be a brat. Like what even is a brat? (According to the dictionary a brat is a misbehaved child) Again, clearly something I am not.
However, with age comes wisdom. And with my wisdom comes the recognition that maybe I am both of these people, and it just depends on who you are.
Majority of people who know me will say that I am well mannered, wise beyond my years, and a great person to be around. These people are the ones who I may not know entirely, or have been nothing but good to me, so they receive the same qualities in return. To me first impressions say something, and also I give everyone the benefit of the doubt, you are good until you prove otherwise.
The select few who would say I am a brat, because I do not speak to them, are people who have not treated me with respect, and after a time, have been in a way pushed out. By pushed out, I mean that I do not associate myself with them, and will certainly not go out of my way to speak to them.
In my opinion you deserve to be treated how you treat others and my personalities may very well reflect that.
So I think it is fair that you should never judge someone based on what someone else has to say.