Seeing the picture of the day has reminded me of something that I'd like to see often with better water graphics.
Distortion of objects under clear water, and better yet for those Dragons that want to lurk is murky water.
To emphasize murky water, not only would it be fun for dragon players... but you could effectively hide some nice scary blight monsters and such in it. That surprise scary element of something jumping out of the water (realistically, not the "water of invisibility" we have now) is fun.