"That's one thing I like about Rainbow.
If you notice, she is almost always hovering just off the ground. Even when it would be better to just stand there, she's a good 5 feet in the air.
Compare to Fluttershy, who acts like an earth pony most of the time. It's a subtle thing, but I like it.
Also, it took me forever to realize that when the Poison Joke "cursed" Dash, it turned her wings upside down. I thought it just took away her sense of direction or something like that. "
Yeah, zerky noticed this too. It's even reflected in their choice of housing. Rainbow lives in a huge pimped out cloud mansion thing with rainbow fountainy things and Fluttershy lives in a comparatively humble cottage-type thing on the ground near the woods.
Come to think of it, assuming Scootaloo isn't an exception and pegasi aren't born learning how to fly or learn to fly at a very young age, how do young pegasus-ponies ever get home if their parents live in a cloud house or in Cloudsdale or something? zerky supposes that if they live in Cloudsdale, they'd presumably never leave until they learned to fly, but the whole place seems to be designed for ponies that can traverse large vertical distances and wide gaps at will. Young/flightless pegasi must have something to compensate for this disability.