...include angel/demon/whateverfeatheryshit wings and humans, should be considered not cool, because it is so.Ok, so let me elaborate a bit.
Not like having them gives the ability to fly by itself, right? It's still the "magic" or "divine" powers that give those characters such abilities. So why not the "conventional" style? Oh, right, that is the unmistakable Superman's flying style. Find another style to visualize it. Too much trouble? Too much fanservice to deliver? Not enough time for quality. Aye. Must be true.