Michael Snyder:

There needs to be a lot of work on the animation of the dragon. The way he is flying is really awkward.

Jonathan Padilla:

The dragon is flying weirdly, and it seems like the timing of each flap is a bit off? Maybe concentrate a bit more on the flying animation and look at some references to get the timing down.

The connection between the dragon and human seems a bit off as well. The human usually has a state of balance or trying to balance, he flows along with the dragon movement, try to make the movements not so harsh. Relax the model a bit?

Overall the concept isn't bad however it can use some working on.

Alan Leppen:

If the scene is taking place in a sky, try to put some cloud backgrounds by using Photoshop.