Echoing Flying Mullet here.

For giving us the ability to control multiple parties. For giving us the ability to play out scenarios in an order we choose, and for giving us a freeform last part of the game. For having actual differences between the Worlds of Balance and Ruin with different tones and themes and distinct feelings of gravitas. For daring to mix cunning politics in, and not just x is an empire and therefore evil. For Kefka's laugh. For a large cast of characters, with interesting stories and personalities, and for making some of them entirely missable and for allowing you to lose some of them in the World of Ruin.

For daring to give us dark themes, like suicide and loss, and dealing with the inability to let someone go, the shame of having hurt someone.