These are the ones I have played.
FFI (barely remember it though, it's probably my first JRPG experience)
FFIII (decent)
FFIV (very good)
FFVI (very good)
FFVII (loved the Weapons & materia, everything else... ugh)
FFVIII (the card game rocked! the rest, not so much)
FFIX (a bit of a return to roots, quite good)
FFX (Tidus made me stop playing, what a jackass character)
FFXII (barely played it at all, just a few minutes, didn't care for combat)
Out of those, I have to go with FFIV & VI. I'm eagerly awaiting the 3D FFIV for DS.
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