Your style would be good, if you actually took the time and drew a full body. and maybe a background now and again.
For example, the detail in and around the eye is awesome (still simple, but awesome simple) if you applied that to the whole image, you'd have the makings of a masterpeice.
I agree with Arthur. Unless you totally lack the skills to draw the human figure you should experiment with more complicated figures. Might I suggest Muybridge's human locomotion series. It shows how the human figure moves and steps and even shows baseball, football, and fighting.