OKay, this is a little idea my friend Mercurius came up with. ^^ (he said he was too lazy to post a thread on it)
We both thought it would be pretty cool to have other different species of Dragons to match the different types of Bipeds. They would have the same schools but have a different look and their Rites of Passage would award them with something other than flight. (Unless they were just different breeds of typical dragons).
For instance, there could be a sea serpent-like dragon which is very snake like, either plodding around on stubby legs as a hatchling or plain just slithering on the ground. And upon completion of it's Rite of Passage, instead of gaining the ability to fly, it could swim underwater for however long it liked. ((With the same limitations as flight, such as not being able to recall and such)).
We haven't really thought of any others, but I was thinking maybe some smaller or larger varieties. :P Just clutching at straws here though.
The dragons we already have could be the most civilised of all the varieties and the most revered and notable. (Kinda like the Great White Shark of dragonkind XD ))
Just a thought. What do you think? :3