Well, to begin, there are no curves, like completely rounded edges, there are only straight lines. There was some shading done, I think, but you really need to take in consideration where the light is coming from. A light source. Body parts behind other body parts should be darker than the others. I am looking at this anatomy-wise, and it is a bit off. Each artist has their own style, and I really like your's, but this is odd. The waist begins then stops, then it is her legs off to the side. Try sitting like that, it must be really painful and odd, that, or near impossible. Her arms are really straight, even though arms are bones, arms do have curves. The tattoos are really nicely done. I think what would make this really great is a background!