I'd have to go with Final Fantasy X. Chrono Trigger and Final Fantasy VII are up there as well and I have fond memories of Dragon Quest I because it was the first real RPG (unless you count Adventure on the Atari 2600) that I beat back on the NES. It's definately NOT Final Fantasy VIII or Final Fantasy IX though. Those games were horrible. *shudders* That's just me though.
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They call me Gato, I have metal joints, beat me up and earn 15 silver points!