NES- I The game that made me fall in love w/ the genre. Took me years to beat Astos, but I kept coming back to try. Multiple party choices added to the replay value.
SNES- VI Great cast of characters. Astonishing world.
PSX- VIII Gunblades, Diablos & the Card Game.
PS2- VII Not only my favorite FF, but my favorite game of all time. The look, the sound, the Cactoids, the political intrigue, I love it all.