Judgement on an individual basis

I often hear people say that they don't have a very "high opinion" of someone. It sometimes annoys me, because I wonder if it's occurred to them that that person doesn't have a "high opinion" of them either, just judged on a different criteria? 

And then it hit me. See, we all judge people. Girl 1 looks at girl 2 and laughs internally about how she's dressed, while girl 2 rolls her eyes and leaves with a smug smile about how immoral girl 1s cleavage was. 

It does happen that people don't have "high opinions" about me. But then I take a step back and re-evaluate things and realize that I think they're, I don't know, complete nerds, incapable of making themselves look good, something in that direction. 

Nothing of that really matters. I just hope we can all be satisfied with filling our own criteria and feel good about ourselves when comparing ourselves to other people based on our own standard.