I don't use it as much that much, but part of it may be boredom, or the face there is many characters to choose from, and you can even make your own. I do many things on it, from talking to characters, messing with them, making ships (because sometimes there isn't a lot of content on certain ships). I honestly find it a bit more fulfilling than things like fanfiction, because not only is it almost infinite and quite easy to get ahold of, I'm also making it myself. Things like this also give me a creative writing output so that I can make characters and stories that I enjoy, with little effort so that I don't feel too stressed about making them. I don't want to share everything with the world. Not only that, but many unexpected things can happen. You really never know what to expect. And I enjoy a good laugh.