My teenage years are a grey blur to me. They weren't particularly traumatic, exciting, or formative just characterless & defined by melancholy, like my environment had me bubbled into a cocoon-state where I was never truly myself. I've always felt this way whenever I've been in my home-town like it's suffocating me and I have to escape.
I had a very day-dreamy, aloof and clumsy personality like I wasn't totally present. I found tasks that involved physical co-ordination or multi-tasking especially hard, like cooking or physical education. I'd not bathe or wash my clothes often as I didn't notice I needed to, and found other's customs difficult to adjust to. As an example, I remember stopping having my hair cut as I found it inconvenient then being shocked two years later when my hair was well past my shoulders.
It was like I was always having to learn things that others found natural and could do effortlessly, which always made communication clumsy and forced. I felt inferior and that I always had to try and catch up to be like other people. One of my teachers in primary school was especially mean and told me I was mentally disabled and that I'd never be able to go to a normal school. My Mother responded by home-schooling me a lot until I caught up, which fuelled an under-dog mentality in me and a resilience to fight especially hard to overcome trying circumstances. I always have got good grades after then and strived to be the top of the class, and think I've become a resilient person.
I never got into trouble, made enemies or got bullied as I was very polite, and good at avoiding attention. I was surrounded by conflict at home, and my response was to become conflict aversive, shell up from people, and null my own emotions as I didn't feel I had justifiable reasons to be sad in contrast to my family who had traumatic backgrounds. My public persona was very fake. I always had friends, but not people who I really connected with or could be open with. Never dated as intimacy frightened me and made me feel anxious.
I spent most of my time in video-game escapism. The few hobbies from then that stay with me now is a love of nature - I used to love taking long solitary hikes through forests and hills where I'd think, imagine I was in different worlds, and write. And music. I still listen to some bands I loved when I was a teen like King Crimson, Kevin Ayers, Mahavishnu Orchestra (and many others I don't anymore :P).
Overall, I try to forget my teen years as there wasn't anything particularly joyful about them. My development was pretty rapid after leaving my home-town when I was 19, and I'm glad my life is a lot more fulfilling now.