I said both for now. Until we find out the stats of origin form, i wont be sure. if origin form has high speed and attack stats, ill prefer it for sure. If it has the same stats as normal(which i doubt), id prefer normal.
Appearance-wise, they both have their ups and downs...Origin form kinda looks negative-cross-eyed(whatever thats called when both eyes face outwards), and his wings are kinda wierd. Im used to Normal form, so i cant think of any negative attributes now. Overall, i just like Giratina, though, so i dont care which form it is. They are both gewd.