Ability for Chocobo's to act more as a gaming companion as well as a mount with bigger personality. Possible characteristics could include:
* Following a player that's walking around when it's safe.
* If dismounted, will run away upon player agro/engagement.
* A chocobo that reaches a certain distance from the player would need to be called, possibly via a 'Chocobo whistle'.
* Building a relationship with your chocobo, possible sprinting, better digging, faster call time etc.
* Chocobo's could not follow you or be ridden into dungeons.
* Breeding of chocobos determines type of chocobo type, maybe one for distance travel that can jump/fly briefly to get pass certain ledges, possibly attack chocobos that can assist in combat.
* Being able to name your chocobo!!!
And that's all I can really think of right now. The relationship between player and chocobo hasn't been touched before. The existing chocobo structure is painful at times but the addition of a personality adds a completely new dimension of game play. Other than that it'd simply be fun.