Need some feedback on a couple areas

I’d like some feedback on this model I’m making:
HelpDragon.zip (144.9 KB)
Specifically, there are a few areas I wanna know if I’m doing right.

First is the twist on the upper arm, is it in the right direction, and is it the right amount of twisting?


Second is the head. The mouth is kinda bugging me, what do you guys think?



Moved to Support ➔ Modeling, thanks for the request.

Hmm… The Arm in the second pix looks fine, but from the back, not so good…the whole arm should twist from the wrist to the elbow but not distort the wrist area but move the forearm muscles. It just may be looking at the wireframe is making it contorted.
The interior of the mouth looks ok to me, but outer looks like “Barney” which I always found Creepy. I don’t know if bringing the rear of the mouth up as a soft smile would help.

Took a look and played around…Brought the back of the mouth up just a little, proportional on.
Took the first 2 loops back from the wrist and scaled-down just a bit.
Took the crease on top of the belly and brought it out and up, just a bit…