ALRIGHT, i am going to give you a short lesson on drawing.. refer to the image below. When you draw, you want to have unique hair style, along with the correct shading around the face, and make sure you dont "overdo" the eyes. Also, notice the detail in the mouth below.... btw.. this is one of my art projects i had to do for a leading company... you may of heard of them, pixar, it was used in their Monsters INC. dvd, it was going to be the boxart, but someone else beat me a tad. .

Heheheh, j/k man.. i really dont know much about art, all i can say is that is really good ... looks like a pro sketch... just the eyes are too dark, in my opinion. Keep it up, you could definately draw refrences for 3d projects . Cya.