portrait: Rainbow Dash

I am rather happy with how this turned out, although the wings look a bit stiff to me. I really had fun drawing my picture of Gilda yesterday. It was great practice, and I have a few rough sketches that I wanted to turn into something.
 
    I have decided that I am going to do a "portrait marathon." I will be drawing each of the main six in this style, and possibly some side characters as well. 

If you would be willing to give me some feedback, I would really appreciate some critique on this. I plan on taking this opportunity to get as many kinks worked out of my style as possible.