I'm 24 but people often mistaken me for being in my late teens. I think it's due to the fact that I'm short, have freckles, and have a bit of a baby face. Oddly enough, I don't get carded as much as I think I would.
Anyway it's a weird paradox. I currently live at home (Although I lived on my own for a few months and most likely gonna move out again in February), still work in retail as a cashier, and still working on my BA. But I consider myself responsible and emotionally mature (Aside from a few procrastination tendencies). And I think I'm doing "better" than most people I knew from high school in terms of being an adult. Still, there's a lot of room for improvement.
I'm also pretty damn meek due to Social Anxiety and thus, I think I come off as more immature and childish to people than I actually am. Or maybe that's all in my head.