@terrana That's interesting. I have never found an MMO that was mechanically fun enough to actually keep me playing. Being online means there have to be some massive concessions to the gameplay, and all of those tend to combine to make an extremely boring and grindy game. Especially popular ones, which are engineered to keep you playing and train you to build a habit and take up your time and money.
I tried Xenoblade Chronicles and immediately bounced off because it's essentially a singleplayer MMO, mechanically. Maybe you could look into that?