Lots of figure drawings! Very nice. From what I can see it seems as though you focus mostly on an line based approach to drawing. Try seeing the forms "behind" the details. This will help you to capture a sense of 3 dimensionality. Of course, you start with gestural lines first, check your proportions (something I need to work on more myself), work on forms and then start adding in those lines. Try keeping your lines solid and to a minimum. Do more with less, i.e. use fewer and more confident lines.
Rock on dude!