Shading and textures are pretty good, but your positioning of facial features is off. For example in the first drawing her face should be taller/higher, along with her eyes. The hair a little tomed down. Assuming you draw from photo references, I find it easier to draw the large shapes first and getting them in good proportion to eachother. In stead of taking a starting point and just going from there, which will end up in weird cropped or stretched out parts.