I don't really like my hairstyle anymore, and I want to change it, but there doesn't seem to be any way to do so. I would love it if there could be some kind of salon area/shop where you could go in and restyle your character via the initial creation interface.
Also, I huge aspect of gen 3 and 4 games I loved was having my own space to decorate. With Hoenn coming up soon, I'd like to say that I'm really hoping for secret bases, or something of an equivalent. It's always so much fun to have a place of your own, and making it to your liking is such a unique experience, especially in the pokemon games when you're almost always on the move. I think it would be cool to have some sort of room you an go to and decorate with cushions, plush dolls and the sort.