You can definitely see that you are putting the hours it takes to be on the road of development with your art. As you look through the years works you can tell that there is the distinct better understanding of the style that you are attempting which mostly appears to be anime. I think that if you continue to pay attention to the different Value's as well as the types of lines that you are using I can really see your art going far.
I look forward to seeing how your art continues to develop over the years. Keep up the awesome work!
In the beginning you struggled a bit with creating a face since it was difficult learning how to draw proportions. Then as time progressed, practice making perfect, it got better and better. 2013 is the moment you finally out did yourself and deserve a pat on the back. Everything leads up a point in a artist's life that causes so much strife. That point is when they are about to give up buy they push through and prove themselves that they can obtain perfection. And you have done just that. I can only imagine how awesome it'll be after 2014.