The subject of this drawing is not original but that's not the point considering this is a fan-art. In the dscription is said this is a "first try". It actualy looks pretty good, there are some holes but the mane style is very well realised. Some other parts, like the hooves and the jeweleryis not as good as the mane but still decent. There is no backgroung, so the not-realistic shadow is justified. The pose doesn't seem to be copyed from anywhere, which is good. there's also a strange black scrub under the main body, I can't tell what it is supposed to be. Considering this is digital art it's easy to fix things like that. Overal, i like the general aspect of the picture, it's pleasing to see. even cosidering the right wing position error (in my opinion), it's pretty impressive. This is not a masterpiece but way better than a rough sketch. Good job!