your hair is very good even if the anatomy could use a tiny bit more work, you're very good at it. Next time make the female muscles more streamlined, usually they're not as bulky as men's. Breasts, when they're natural, sag a little bit when they're larger. Not too much though
you really have potential to work as a comics artist!
This is a particularly older drawing though, as I'd personally say I've improved quite a bit since this picture was made (probably days before I put it here on dA, If I remember right); so I don't believe I have that problem witht he breasts any more, but thank you for the tip nonetheless