'won't look like a tank'

Excellent job, I would like to point out that the edges seem a bit rough in some areas on the her wings.
The bead/whatever is holding her mane kind-of sticks out to me, the reflection on it seems a bit off.
The wings seem a tiny bit too far up on her body.

I *could* use a bit more detail in the wings, might I suggest adding some feathery detail?

I think my favorite part about your work on this piece is the absolutely splendid shading job you did!

VERY good work, you should be known more! I hope to see more from you!