I must admit I have found myself judging people by their weight. These are the first few words that pop into my head when I see an overweight person:
Shy
Sad
Lost
No sense of self worth

When I see someone slim I do tend to wait to speak to them before I judge them.

I know this post may offend people and I know that by no means to the above words apply to just overweight people and not all overweight people feel like that. Just my thoughts!