For me it goes:
VI (by a large margin)
IX (Jim Sterling covers this game's good points pretty well)
VII (Overrated does not mean bad)
FFTactics (only the original... fuck the Advanced versions)
IV (Mostly nostalgia factor here to be honest)
VIII (Squall is a mope, but still more likable than Tidus)
V (Not bad, but I played it too late for the nostalgia factor to take hold)
Mystic Quest (bite me, the music was good)
X (Square's first foray into voice acting killed the game for me. Also, Tidus is a baby)
...I never finished any of the others, though I keep swearing I'll get around to finishing XII one of these days(at which point it will probably get pushed at least above X for having better voice acting).
VI (by a large margin)
IX (Jim Sterling covers this game's good points pretty well)
VII (Overrated does not mean bad)
FFTactics (only the original... fuck the Advanced versions)
IV (Mostly nostalgia factor here to be honest)
VIII (Squall is a mope, but still more likable than Tidus)
V (Not bad, but I played it too late for the nostalgia factor to take hold)
Mystic Quest (bite me, the music was good)
X (Square's first foray into voice acting killed the game for me. Also, Tidus is a baby)
...I never finished any of the others, though I keep swearing I'll get around to finishing XII one of these days(at which point it will probably get pushed at least above X for having better voice acting).