Ah, hello there! I drew a picture about three months ago, and I've asked on various sites for critiques on how to make it better, but all I get is peppered with compliments and nothing useful. Or complaints about the eye, or supposed lack of, - but still nothing on how to make it better.
I'm hoping to have a bit better luck here.

Not bad~ I like the foggy effect.

As far as improvement, the wings are the things I notice that stand out as being off. They're a bit too far back. The place where the wing attaches to the body would look better just above and slightly behind the dragons arm.

William O'Connor is a wonderful dragon artist and the author of Dracopedia, in which he includes a variety of dragons. You might be able to find some useful reference material if you look his stuff up. :)

Thank you. I'll fix that the next time I draw him. Is there anything else?

As for William O'Connor, I had never heard of him, or the book. I agree though; he is a wonderful artist. I'll have to go check out his book sometime.

This is really awesome, I rarely see others draw eyeless dragons.

The other side of the mouth seems to be absent, no hint of it, not even tips of teeth. Next time you draw something with a long, open mouth like that, remember that you would usually be able to see hints of the other side of the mouth to give a perspective on how the head is tilted.
Another thing is that the arms seem to be joined at a funny spot. They join at a place where the center of the chest would be, that being towards the front of the body, while arms seem to normally connect towards the back of the body, around the shoulder blade area. (also the way the back legs join was bothering me)

(the blue is me highlighting the frame of your drawing, the green is my recommended edits(sorry about the crappiness, computer mice weren't meant for drawing))
I sincerely apologize if I have offended you, I just want to give you a critique.
By the way, what program did you use? I really like the mist effect.
The way you are doing the hind legs reminds me of a frog's legs. You might want to use frogs as a reference for how the hind legs join.

No, no offence taken! XD The whole point of making this thread was to get critiques on my picture. Thank you. I'll fix that as well the next time I draw him. :)

I used one of the older versions of photoshop. Adobe Photoshop CS2.

Dodge tool - make the what-cha-call-it-thingy roughly around 1/80 of the size of the picture, circular, and flowing - 15-30% opacity (depending on the coloration and how foggy you want it) - lightly go over the drawing a few times. It doesn't matter if you go over an area you already went over, or missed areas. it just adds to the effect.

This is cool! I like it!

Re: critiquing, I agree with the previous points made, but one other thing stands out to me. The size and placement/angle/something of the leg on the left seems a bit off to me. It looks smaller than the one on the right and the line of the top of it seems to follow the line of the body almost exactly when I feel like it would maybe cross over it at some point?

I hope this helps and isn't just confusing rambling ^u^

Forgive me if this was intentional, but I noticed that the scales that ridge the middle of the neck don't all go the same way. I think it would look better to either make the spines more defined so it's clear that it's intentional or to try to point them all the same way.

I also think adding texture to the dragon would improve the picture. Some lowlights or highlights and to give the scales some shine in some places to add definition.

Looking good! I noticed that the wings seem stuck on the same side of the back, if its a dragon with four wings I think thats fine (Just place some hints that there are wings on the other side of the dragon's back!) It's great though! :3

It is really good! One thing you can do to improve (which no one mentioned, I think) is to add more detail to the red body by using different shades of red or giving it some kind of design like you see on the genes on the pets on this site.