Makes me want to try digital painting. (This is digital right?? Some things about it make me think 'digital' and others, 'no, it's gotta be real paint!')
As far as trying to find fault with it goes, I think I can list a few things so long as it's understood I like the dragon overall :3
- Overall, some shadows could be more pronounced. This strikes me most within the dragon's mouth; light shouldn't be getting in there unless this is flash photography. So the dragon looks flatter and less dramatic to me since the shadows are so mellow.
- The orange in the mountains has a sharp line where it's not there anymore, it kind of draws the eye away from the dragon.
- The clouds are a bit monotonous
I can totally picture him sitting on a little ridge, and the two snow-caps being farther away in the distance; but my first thought was that he was huge and must have a hard time breathing way up there.

I can even see that those mountains in the back are colored a little different to push them away from being connected to the ridge. Maybe if they were blueish from the distance it would help? or something like that...