I would like a custom Loftwing that resembles a vulture or an eagle a little bit more than Loftwings in the game. She would have a dangerous curved beak, sharp red eyes and black body-feathers. The wing-tips would be shining gold. The riding-strap I'd put on her would be made of strung-together bones, hollowed vetebrae that ended in a chest-plate made from the skull of a horned monster, something dragon-like or perhaps like the skull of an Ordon goat.
I imagine the Skyloft Knights would mistake me riding my Loftwing for an enemy riding a monster every now and again.