The best ff storyline has to be ffvii. The best game play has to be ffx.
The most disappointing has to be ffx2.
I enjoyed ffvii because it had been well thought out and wasn't rushed like ffx2 had been. If ffvii and ffx were made into one it would be the perfect ff.
I agree that Final Fantasy VII is the best with an envolving storyline. I am not a big fan of the system though. Though easy to understand and use, it is quite frankly a boring system that seems a little unrealistic and unlike the storyline doesn't make you feel envolved, detached instead. LOTR 3rd Age was in part spolit be the adoption of this terrible combat system. However maybe I am just holding it up unfairly against recent and far better rpg control systems.