Well, there goes my "every want's power" theory. xd Looks like no Reborn fans.
Let's just say that I'm almost as surprised that Gildarts got approved as I am Madara. O_O From his explination, his powers work in reverse of most people; he has to force himself to not use them, instead of forcing himself to use them. Well, that's his explination for Crash magic, at least. Crash basically let's him destroy anything he touches (that's the innate part he has to stop of his own will).
According to rikerslade's description, anyone who control's gravity completely is haxxed, and therefore unapprovable. Gildarts walked straight up to a guy who has this ability, while it was active (so he was forcing himself to move against gravity which was impossible for anyone else to stand in), destroyed the spell when he was an inch from his opponent, and defeated him with one punch. O_O It's a good thing he's a good guy.