A very difficult question... FFVII is what started it all off for me and my love for FF was upheld by each and every FF game I-XI. My favourite keeps changing depending on which one I have replayed recently. I think my long-standing favourite was VIII but then I went and replayed VII and fell in love, then I played X and the same thing happened lol. If I had to chose I would probably pick VI-X as equal favourites ;)
For me the series went downhill when Square became SquareEnix (X-2 onwards), without exception... At least I have the old ones to keep me happy :)
