When you start working out, your body will start to change. When you stop working out, your body will change. When you eat healthy, or eat like crap, your body will change. If you have a baby, or get sick, or get in an accident, your body might change. And if none of those things apply to you: as you get older, your body will change. Our bodies are so cool. With time and/or work (or no work), we can change how we look.
I love all the support that's been going on recently for plus size models, and the "Real Beauty" campaigns. It's great to focus on recognizing the beauty within everyone. ..but people, that means, everyone. Those campaigns aren't meant to say that those "regular" sized people are the most beautiful. They aren't meant to say that if you're skinny, you're overrated. They aren't meant to say that curvy is the most beautiful. Their point is that there is beauty in everyone, and it's okay to be the size that you are.
I've seen quotes online that put down people who are "skin and bones", while "real men like girls with curves". A person getting called "too skinny", is no more acceptable than a person getting called "too fat". Be happy for you who are and what you have, but don't forget to be happy for them, and what they have.
One other physical judgement I've heard an overwhelming amount of times recently, is calling someone out for being "too muscular". I've seen friends and family look at pictures of heavy weight lifters, and body builders or even a woman with a six pack, and respond with, "gross" or "that's too far" or "they're too big". It makes me really SAD! First, I doubt you would find it okay for someone to call your lack of muscles "gross", so why is it okay for you to pass the same judgment? Secondly, those people have worked so incredibly hard (..most of them anyway) for the changes they have achieved, for their fitness, and for their body, and you think that's gross? I think that attitude is gross. If you don't want to change your body in that way, then don't, you don't have to; but think of the time, dedication, effort, and commitment that those people had to change themselves.
What an amazing thing it is, to be able to change ourselves, but have our beauty remain constant.