I ended up getting burnt out multiple times throughout the time OSRS has been back. But I keep coming back to it over and over again. I've been playing RuneScape since 2002 on Classic. Jagex has taken so much of my life away from me.>>555
Other than mentioning OSRS, I used to play DOMO (Dream of Mirrors Online), Aura Kingdom, other MMOs that were on Aeria Games, and some other various anime MMOs for a short time.
Aura Kingdom I thought was a beautiful game and by far the one I regret quitting. However, there just wasn't much of a playerbase and lacked a lot to do at the time of me playing it. Plus that's around the time my depression started getting the better of me and I would get start getting burnt out too easy once I played something for too long and couldn't stick with one game. Kind of similar to what happened time and time again with OSRS.