yeah, I've found that the nose is particularly hard to do.
Now don't get me wrong I think your pics are awsome, but might I sugest a lot more shading. I know it might be scary especialy after all the time and effort you put into it, but sometimes you just have to go for it.
If it still seems too scary, print a copy of the scetch from the computer onto a piece of scetch paper and pratice your shading first.
If yur not sure how to go about it check out how famous artist shade their pictures. Study how they shade the muscle contures, and how they show the light hitting whatever their drawing.
Also when drawing the wings on a dragon it may help to study the wings on a bat since they're so similar. I know you can't just snatch a bat out of the air and take a look at it's wings, but most libraries have really good animal books with pictures to go by.
I hope I'm not sounding like an bleep.
