I like it! You have a nice line quality, especially around the eyes. I don't know if you consider this a finished work, maybe not, but at the moment I feel like the image lacks focus. Because it is the 'outlier' in the range of greys you've used, what you've outlined in black is drawing attention over the rest of the image. This means the sides of the face are most prominent, followed by the teeth, etc. For me, the focus should be that beautiful eye you obviously put care into. Maybe if you nix the black and use that dark grey again instead? For a quick piece you've whipped out in a day, it's quite nice and a good start for a character design.