A chocobo has always been the standard mount in Final Fantasy Games.

Given there are times you would ride in a train/boat/buggie/car. There would always be the traditional chocobo mount.

I think there should only be Chocobo mounts, i was very surprised to see Goobbue mounts, but whatever was nice 'thank you' gift. But thats all it is really, just a gift. Much like the seasonal event items, its basically worthless.

Come 2.0 we will be fighting alongside with our Chocobos, so I think they should be the only type of mount since you will most likely be upgrading or leveling it up, something of the nature.