I think you should pixel cleaner. Not that everything has to look clean and smooth, of course, but your stuff looks jaggy, unfinished and full of random pixels and broken lines.
Your palettes aren't really efficient. Most of the colors you pick (for both shadows and highlights) are too close, and all they do is make the pictures messy and blurry. Also they are sort of muddy, which (at least for me) aren't that attractive.
The shading is rather random. It sort of hints you are trying to have a lightsource, but the way you pixelled it is really messy.
Don't put stuff just because. Give the things you do reasons.
Also you might want to try and look for lighting references (how things look when affected by certain lightsource, how do different materials react to that, etc). Especially for clothing
Once you are done that, you should move on with AA and dithering etc.
Good luck with further updates.
