This is the one game I'll be pulling for the most. Final Fantasy VII may have been a latter installment, but it was arguably the most highly anticipated and over-played game in the entire Franchise. Before this, I would've suggest Final Fantasy III for the Super NES, as that was the game that sold me on this Series.. yet it was VII that drew me into the amazing storyline and overall graphics.
While there isn't any contest on Graphics from the Playstation to the Super NES, the fact is the storyline was absolutely amazing and arguably unbeatable throughout the rest of the games made from that point. (VIII, IX, X, X2, XII)
VII introduced us to a whole new side to everything, and it's also the only game (not including the ridiculous stupidity that was X2) to spawn multiple (yet crappier) spin-offs into other games, and even a movie!
If there is one RPG that people vote for, it definitely needs to be Final Fantasy VII because it's the end-all, be-all to RPG's.