Hello Sah, welcome to the Escapist.
My first online game was Neopets. It was there I learned how to write well for such a young age and also my first forum. I was involved in the forum roleplaying scene and enjoying the games the website offered. I had a Shoyru and he was adorable.
My second online experience was much more involved. It was Runescape, a game that was much more about the online gaming experience then a website like Neopets. Runescape was like the first World of Warcraft type game of its kind. A large 3D world RPG with dragons and hundreds of things to do and friends to make. I played it with many friends, but I left it for World of Warcraft when it got released. I only stayed on World of Warcraft till the 'Burning Crusade', which was the first expansion pack.
I tired of the "MMO" type of game, because I had enough assholes to deal with at school so why should I put up with them in my videogames? I didn't want to be told I was using the wrong skills or wrong weapon. I wanted to have fun and release steam.
Now I play League of Legends, an interesting game concept based on a mod for Warcraft 3. League of Legends is asshole city, but now that I am older I find myself not being bothered as much. I think the matchmaking system could be designed a little better. Like one playlist for casual gamers and another for assholes.
Warcraft 3 and the Halo series is most likely the most fun I had in an online game. The early days of Warcraft 3 before DOTA was a golden thing.