Heads up on the dithering, I think you did fairly well for dithering especially using different hues, I admire people's ability to do that. (Because I suck at it.) I agree with Blick, the scratch lines look a little odd. His arms also look a little odd, I know how the arm does that kind of .. flab coming over the edge thing but it seems a bit too much/too deep. I really really don't know how to explain that very well. Sorry.

His head is a little straight, but I like it. The blood could look alot better.

I think it's potentially a good sprite, however the shading needs more contrast (more difference between each shade), and perhaps an outline, whether it be black or a much darker shade. If he's wearing a cloak, the bottom half of it doesn't really give that effect, it looks more like pants. His body mass, well the cloak, should be thicker.

Good work however, keep it up.

A few things - the left ear. Is looking wonky, you may have to fiddle with it. It goes skinny before the fold, this doesn't look very good.
Also, the arms - the upper arms are pudgy and seem to squish his bunny-boobies in as if they have some cleavage.

Other than that, it's cute, yet devilish.
Can't wait to see the colouring!

The difference between two or more things.

eg. Low contrast means there is very little different between shades of colour (which makes it dull, and pillow shading-like).
But higher contrast sprites look better, stand out more and are all around more visually appealing.
Too much contrast and it looks stupid, as if the shades or shadows are totally different parts.

I think they look good so far, you should do alot more on the troll and repost it because at the moment theres not much to critique, it looks sweet at the moment.

And the screaming baby is quite humorous.