Main problem with MMOs is that I don't have enough time to really get in to them. I love to raid, but with school + wife, there is no way I could do that.
I still pick up expansions, but play them as a quasi-single player game. I enjoy what I play, but I go in knowing I'll never experience the end game. On the other hand, I don't really enjoy what they've become. WoWs RNG-fest at the beginning of Legion pissed me off and I never liked their Warforged/Titanforged/Whatever system they've thrown in. Perhaps it's rose-colored glasses because I look back on my EQ days so fondly. While I really miss the forced social aspects of EQ and how long it took to really do anything, if an MMO came out today that echoed that, I wouldn't actually be able to play it due to a lack of time.
So, I sort of enjoy what is out in a sort of Summer blockbuster way - fun while it lasts, but not very deep or satisfying.
Another problem I have is that I will always compare what I'm playing to EQ. Nothing will ever recapture that feeling of wonder and mystery, but regardless, I'll still compare them.