I quickly got tired of casual and its issues, so I hopped of the first crazy community server I saw to play something wacky, funny and unrelated with TF2's more serious gameplay.
The server I joined turned out to be wonderland trade plaza, which was a horribly laggy chaos full of random plugins at the time, but I enjoyed it anyways since it was the first time I ever played a crazy thing like that.
Eventually I got tired of the lag and plugin clutter and looked for a normal server that didnt scream "FREE ITEMS!" in its hostname because at that time it meant to me "Shitty laggy server full of F2P's and kids" because of the experience I got on wonderland.
Through the server browser I landed on blackwonder, enjoyed the 2fort and jb servers, added them to favorites, started playing there more regurarly and eventually I learned that blw forums and blw discord exist.
Fun fact, if it wasn't for blackwonder I probably would never know what discord is.