9 and 10 but i do have to say 10 was my first FF game that i really got into so it has the most meaning for it for 7 and 8 i was never bothered to finish them,i actually almost finished 8 a time but never got passed disk 1 of 7
FF6 has the best story, IMO. FF2 is the runner-up in the category. For gameplay, it's not a good lineup, but FFXIII-2 was the most fun to play, with FFXII being slightly farther behind. And finally, the nomination for "The FF Game that Gave Me the Biggest Feeling of Nostalgia, Despite Having Never Played it Before" goes to FFI.
FFII as in the actually II with Firion, or FFIV with Cecil?
II with Firion. The idea of a villain whose good side is evil enough to take over Heaven just amuses me greatly. The only thing I hate about is the leveling system. That, and the seeming randomness of the fights. Grind for days for the last encounter in the Rebirth mode? Get your ass handed to you by random mooks. Come back 5 months later? Beat the crap out of Ultima Weapon and beat the game in the same day. WTH game?