This is a story I've told many times, and some people here lived through!
When I was about 8 or 9, I had an assignment where I needed to write a report to share with the class on something I cared about. I grew up with an SNES in the house because that's what my mom had growing up, so I had played plenty of games with her, including SMW. I decided to make my report on SMW but needed names of some enemies, so I looked it up and found the wiki. After I finished the report I was still really enamored with the wiki and the 'Shroom, and eventually when I was 9 I ended up joining the forums. Cue expected shenanigans
I left for a few years around when I was 11 or 12, returned at 14 under a new account because I missed the community and had more natural ability to get involved, am now where I am. It's only a little weird to be able to say I've been on this site for more than half my life, even at the age of 21