Lately I've been disliking the sub-16yr/old people more and more. It's generalizing, but my perception is based on personal experience and encounters. I have a 14 (turning 15 in May) year old sister and she aggravates me to no end. She's very loud, obnoxious, has no manners or respect, etc. The filthy language has gotten to her already. Why is it that people around that age can't learn the "bad words" without abusing them and sounding like a complete moron? All her friends are similar to her too. The whole giggling all the time thing, being obsessed with Ja Rule and pop music (I don't mean to include rock as pop music, you know what i mean when i say pop in this context), being obsessed with "coolness", etc.
Talking to 14-15 year olds and then talking to a 16-17 year old, I notice a huge difference. But above all, just the people in college I find are far more (again, generally) mature. It's such a nicer experience to go to college than high school. People are no longer cruel and judgemental, at least not to the degree of people in elementary and high school. I never had any self esteem, but it's slowly building now that I go to college.