I've changed a lot. I've lost weight and got more muscular, and basically way better looking all around, since high school (5 years ago.) I also am a lot more religious now compared to high school, and that's had a massive effect on me. I think a bigger thing is, after high school, I became a lot more my "true self." No more metal, no more rap music, I now listen to mostly girly pop music, cuz I like it and nobody is around to make fun of me for it. The other thing, too, I'm a lot less "nerdy" now. In highschool, since it's all about like finding a crowd, I found the "nerd" crowd, and conformed a bit to them, and now I've gotten more or less "cooler" and my interests aren't as nerdy anymore. I still have my nerdy interests, but I have "cool" ones to offset the nerdy ones. Like I'll still watch anime, play video games, and the majority of the music I listen to is Japanese, but I work on cars, ice skate, and lift weights and go outside a lot now, whereas in high school, I was dragged down by my friends to watching anime and going on 4chan and stupid stuff like that. Like now, I wear preppy clothes and many people would probably go say I'm a "jock" or something like that if they didn't otherwise know me. Also, I've become more confident and assertive, though I obtained that through trial by fire.
I don't know, right now it's weird, as I feel I'm a weird dichotomy of sorts, I'm nerdy as hell on one hand, but people cannot guess that about me until I open my mouth due to how I've learned to like, dress myself and carry myself.