I first used the Internet when I was little, but didn't start using it regularly until I was nine or ten. (2003-2004) Around that time my parents got a connection in the house, and since they trusted me and I was an older kid, I was free to do whatever I wanted online.
I discovered fansites, which was utterly amazing to me, because I had always liked drawing my own fanart/making fan stories/theories/etc. but was told by everyone around me that it was weird. People looked down on me for being so into games and shows, and I didn't know anyone else who wanted to make their own content. Then, suddenly, there were entire COMMUNITIES full of people who not only loved Spyro the Dragon and Pokémon as much as I did, but created their own works based on it. That blew my mind!
That summer, I discovered forums, and they quickly became one of my favorite things on the Internet. I joined a Pokémon fan forum called Mew's Hangout, where I made a ton of friends, and many others, including a small forum where I met someone who I'm still friends with today. That same friend introduced me to my boyfriend nearly twenty years later, who I now live with, and we went and visited her in person last year!
I dislike the direction the modern web is going in, though. Personal websites and pages of fascinating written content almost extinct (the whole reason I started using the Internet!). Forums mostly gone (the other reason I liked the Internet). Social media, which is horrible, toxic, boring, and nowhere near as good as the personal websites of the past, taking over. Corporations and money owning the Internet rather than the users creating content for fun. Forcing "mobile friendly" designs on everyone, which look like garbage on desktop and make every sentence big enough to take up the whole screen. Proof that no one comes online to read anymore, which I also hate. I hate it. Usually when I go online, I post on forums, dig up old websites, or use Archive.org. There are few things about the modern web I like.