Aside your story and character preferences, what would you make mandatory in future FF titles?

Gambit System - if you plan on giving me only one character to control at least allow me to adjust my AI partners. Gambit System is without any doubt one of the most complex AI systems ever to appear in a video game. It gave you so much freedom over your characters, you could control your characters completely or they could act on their own to everything in between.

Mini Games - I was disappointed by serious lack of mini games in FF XIII. That being said dozen of shallow mini games won't do either, in all honestly though I'm perfectly fine with just two. Those two would be Triple Triad and Chocobo Hot and Cold, by far the most addictive mini games ever to grace FF.

Hunts - missions/hunts in XIII are bit uninspired, more on a note of what XII had to offer just improved, if possible.