Male, 20.
Men: 15-24
Distant. Perhaps polite, often just apathetic. I have no friends in this range.
Men: 25-34
For some reason pay a bit more attention to me than the younger ones, don't know why. Slightly friendlier terms. One friend in this range.
Men: 35-49
Usually friendly and more respectful than the other ones. Don't have friends in this group, but I lot of my professors have been in this category (and older), and my professors always seem to like me.
Women: 15-24
Nicer to me, have more interactive relationships, but still essentially as emotionally distant as the males. Big exception is that arguably my best friend is in this category.
Women: 25-34
Seem to like me more than an other category listed here. I have no clue why. Don't technically have any personal friends in this range, but a lot are very friendly with me and seemed to have the potential to be friends, if I spent more time. Almost seem to seek me out... but maybe I'm crazy.
Women: 35-49
Like the males equivalent, but nicer and closer. Sort of maternal. They seem amused with me somehow.
Analysis:
The older people get, the more they seem to like me, as an average.
Females are friendlier and more engaging with me.
Why? Well, I can't really tell what is going on in other peoples' heads. I can make some very rough guesses.
I am usually refered to as being "beyond my years", and I might have a maturity about me that is easy to talk to for older people, and may also seem like a pleasant relief from other people in my age range.
I am usually considered androgynous to feminine, and I'd say I'm a very unthreating person, including in a sexual way. All of this might be the reason I attract more friendlike attention from females.