Never felt compelled to play FFIX. FFVII (as far as I remember) had more chocobo-stuff than any other FF, with it's chocobo racing and breeding and whatnot, and for this reason the chocobo theme is the most chocobo of the lot. It might not be the best tune - I don't even remember some of the others - but it's definitely the most chocobo-ish one of the lot. So many variations yet all with the same boppy feel to them. Lovely stuff. God I love chocobos.