I'm going to go ahead and say that for me, it is either the original Final Fantasy, or The Last Story.
I actually love Final Fantasy so much that when the battery in my copy died, I got off my ass, watched some youtube videos, got a new battery, and replaced it myself. I went as far as soldering wires directly to the battery, which is like the dumbest idea ever, but I really wanted that cart to work again.
The Last Story was just kind of a really refreshing take on JRPGs. The story is as tropey as it gets, but it had some pretty sincere voice acting (by a great all British cast) that kind of sold the whole thing. Then on the game play side, the combat system is like nothing I've ever played before. It takes some queues from western RPGs, with the ability to stop the fight and command your party members, but the way the spell circles and stuff work makes the strategy of combat a really fun experience. It was the first JRPG since the 90's that I was able to actually sit through and finish.