Coool stuff, man. Dragons are and always have been awesome, and it's good to see that you obviously put a lot of time into these drawings, too often things are left half-assed and unfinished.
That said, you have a pretty clear lack of understanding of space and anatomy. It would definitely be beneficial for you to read some of those "How to Draw Animals" books. Along from being educational, they're also super-fun! It's also important for you to think of the things you draw as 3-dimensional objects, it makes it a lot easier to see your subject as more than just an image. It's definitely worth it to sit for a few minutes and think about where the eye and ear should "come out" from the far side of the head. Woot.
Keep it up!
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