FFVIII for me (just edging out FFIX). I do love all of FFVI to FFX, but the moment I first saw the opening FMV to VIII I pretty much fell in love with the game. I really enjoyed the plot (though I know it's one of the reasons the game is so 'love it or hate it'), it has a fantastic opening and ending, some great music, and I liked how certainparts of the storyline were left for the player to piece together themselves. I still grin like an idiot every time I see the ending to the game.
