I must say I didn't immediately see charizard in this picture. It's probably because of how you drew it.

How he sits is a pretty surprising and odd. Not in a bad way though. You always seem to have some way of drawing stuff unusual, in another way than most people would. That's probably what I like most about this picture.
With that I mean how indifferent he sits. In that way he reflects charizard perfectly. His fat belly and mean look make him look a bit human.
The only thing I don't like about him are his arms. They look a bit too square.

You can still pretty clearly see that it needs a lot of work. You rushed two things: the background and the lighting.
The clouds are made well, but it's not a lot and you can hardly see it. There are hundreds of things you can do with a dragon like this. Make a picture of it, and not a sketch!
The shadow can be done in twenty seconds. You can't see the dragon in it at all because there are parts of his body sticking out which isn't in the shadow.

I love your drawings, but put some more time in them and it will score much higher. This just seems too rushed.

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