Generally speaking: While I certainly adore the amount of detail that's put into all of the game's animations, I hope that jumping won't suffer from the same ailments that current movement does (i.e., have to stop, then perform action, then move again); that fluidity and the "
joy of movement" is the new name of the game. Continuing with that, I hope that characters will all feel like they belong or have a sense of place in the world; like they have weight; and that they move/jump accordingly; that when I walk off an edge, the movement isn't just "straight down" (like it is right now), that my character still has some inertia, even though he didn't actively jump off.
I don't mind if every race has the same jump height (from a design view, that's the way it should be, imho), just as long as it looks relatively believable and it's, most importantly,
fun.
Lastly, with jumping, you guys (Square) are effectively adding a 3rd axis of movement to the game... don't squander it because you're just adding the ability to jump for jump's sake. For example, you now have the opportunity (and the collective imagination, I'd bet) to make some really interesting, more-vertical-than-usual environments (and gameplay). I hope you take advantage... (especially with stuff like the forthcoming Crystal Tower).
(^Granted that's not solely contingent upon being able to jump, but implementing the ability certainly lays some groundwork.)
Oh, and chocobos will be able to jump, right?
RIIIIIIIGHT???

lol