When I was a kid, adults saw me as an intelligent person, someone who is a lot smarter than everyone in his age (and I truly was). I usually made friends with adults, because I could talk to them about various topics. They were annoyed sometimes, and wanted me to play with other kids, but I didn't see any point in that. I didn't like kids because they were loud and stupid, and they didn't like me because my peacefulness and interest in the world was just weird for them I guess. I was the textbook case of a "young professor".
As a teenager, I tried to shape how people saw me. I wore all black, riveted belts, spikes and chains and whatnot just to piss people off and drive them away from myself. And I took pride in being successful at both. I hated the fact that clothing influenced how people saw me, but I enjoyed using this to my advantage (or disadvantage).
Now, as a young adult, people usually see me as overly polite. I never know what social distance I should keep, so I try to keep the maximum, and be as polite as I can. I might seem cold because of that, I don't know. People of my age like me better than they used to when I was a kid, but they still see me as a weird person. I think they make friends with each other too easily, and I tend to back away when they try to make friends with me. It shows in practice when they try to talk to me about personal topics and I tell them directly that I'm not going to be a partner in that. And I usually don't come up with topics just to keep the conversation going. They might feel a need to talk all the time, but I don't, and it annoys me when they ask me stupid questions or tell me stupid stories just to keep me entertained and part of the conversation, because it is a waste of my energy. I usually just nod until I come up with a good excuse why I have to leave, then leave. Being social is very important for people where I live, and they assume it's true for everybody including me. I'm sure they see my craving to be alone as something strange and unfathomable.