I was a regular player about six years ago, but I got to a point where I couldn't progress any further without going on zillions of raids -- roughly level 40, if I remember correctly? Not all the way through the original main plot. Anyway, I only knew one other player at the time, and I got tired of pick-up raid parties with strangers and quit.

It was a fun time until then, though. I liked the setting and a lot of the little visual details. I haven't made a habit of playing MMOs, so I don't know how it measures up as an MMO, but it was definitely a good Final Fantasy game, if that makes sense?