Fun is subjective. One man's fun is another man's tedium. That said, I do disagree with jgaf when a lot said it is the "worst FF". I dunno. I think it's a "better FF" than FF2 nes, but it's by far and wide my least favorite in the series, for all the reasons I've already discussed - distinct lack of variety, poor writing, low immersion factor, low difficulty, questionable level design, poor world building, handholding;etc - but I would still say it was worth playing. It's a really different kind of game and no matter what my feelings are on it, it's experimental enough for me to respect it. It's like Breath of Fire: Dragon Quarter except in Final Fantasy, except not nearly as good.
But once again, it's extremely hard to want to continue buying the [FF] games because I never know what I'm going to get: "am I going to like this?" I've liked every FF I've played, and I still like some aspects of this one but it's striking to me that my current game tastes and the direction of the series (if FF13 can be perceived to be that direction), are polar opposites.