xD Terrific stuff!

Perhaps the most outlandishly impractical FF garb, for me, is Tidus' blitball uniform.

Metal armour? Check. Long wallet chain? Check. Hooded shirt? Check.
With those powers combined, you'd have someone who'd sink like a stone. Even if he could manage to keep afloat, the dopey and useless hood would act like an underwater parachute, to keep him in one place.

Now, I'm all in favour of creative and imaginative character and costume designs - but the FF series really ought to get input from people who understand practicality and combat.