Final Fantasy VI, def the best FF out there. 7 comes close. I played on an emulator with a rom. I've heard the FFA version changes some things. I highly recommend either the original SNES or an emulated version of it. Plus, if you emulate, there's no load times! And there's save state. Which is cheating. So don't use it the first time around.
Celes is the best...Lightbringer+Hero Shield + Miracle Ring + Any decent armor (Minvera) - Unbeatable.