I think this is a neat idea too. Final Fantasy 7 did great with giving us the option to raise different breeds of chocobos, that gave different colours and abilities. I remember spending hours on end trying to get a golden chocobo (which I did get in the end!) and it was a blast doing so.

Also, adding to the Chocobo racing mentioned before, that's a great mini-game to add to this game too! FF7 did that as well and it was fun! You race and get prizes if you win! :'D Ahhhh the good old days on the PS1... lol