1 - Sense of accomplishment arrived at from difficulty.
3 - Excitement from finding new job classes, or even new weapons
4 - Creates a sense that the conflict is so intense that even party members aren't safe.
5 - (SPOILER)Two worlds coming together into one and changing the world map. So cool!
6 - Exploring the WoR and seeing how everything has changed.
7 - The setting that was created. Quite a bit off typical fantasy, and the pre-renders really brought it to life
8 - Squall at the beginning of the game
9 - The Terra sequence Screw all the haters.
10 - Combat system (system, not difficulty tuning)
12 - Uh... Quickenings looked cool?
13 - Lightning's in battle animations
T - Diversity of character skills. Most SRPGs tend to end up with a screen of melee in front attacking, and archers and mages behind attacking and casting spells. In FFT every character had a bunch of different skills to learn, and because of the maps and party sizes it didn't feel like two formations colliding, but two parties colliding.