That's an interesting artistic style, I like it.
My immediate thoughts:
The arms might be a bit long. I wouldn't expect human arms to go too far past the crotch. You've got quite an elongated style though, so you might get away with it.
As you've probably noticed, having a non-outlined character with such contrasting colours (black, white and flesh) might make it hard to find backgrounds that work. For example, if everything's dark, the clothes will disappear and leave a disembodied head and arms. If the background is a mid-tone, you might lose the head or arms and just be left with clothes. (I find the arms quite hard to see in all the examples here.)
The trouble is, an outline would probably look bad (it would thicken black areas and make those thin limbs feel more chunky) and my preferred technique of darkening edge pixels won't work because of the small number of pixels available.
Artistically I see why you're using all the shades you are.
What kind of environments will this character be inhabiting?