Nice, what did you use to draw it?
This looks like it was done by hand for sure. It seems that you used a black marker, black pen, and... what else? how did you get the grey and lighter black there? Perhaps I just have your list of materials used wrong, but it just doesn't go with those two things. What did you use? :P
I think it's a really cool character design. I usually comment on how I like to see more of a background with characters, but the way that the major color was black, the white actually acts as a nice contrast and makes the piece very pleasing to the eye.
I really like the face that you have in the upper left hand corner. The detail and the small blotch of yellow in it's eye really goes good. I would like to see a picture of this character from the front like the face there. Maybe you have in in your other art and I'll find out if you do.
An all around good character design and good presentation.