read what I said about outlines inside the sprite on your other thread, I think it applies here too.  I would also say be more bold about your shading.  Try thinking about things in terms of bold shapes.  Shapes of color combine to make the image.  Try thinking of it that way and maybe you wont need to rely so much on line.  Lines can be fine, but I think here they are flattening the image and holding you back.  Be bold in color choice; increase contrast to convey form more immediatly, and change the colors depending on the light.  For example you could increase saturation towards the light and decrease it towards the shadows, or vice versa.  You could also consider making colors warmer towards light and coolor towards shadows or vice versa.  The drawing seems pretty accurate except the forarm on our left side looks a bit bulbous, check the shape of that part again.

better in my opinion.

He still seems kinda dark, i suggest using lighter outlines

also, (not really important if it's by itself but) if he is in a snowy/frozen environment, then a lot of light will be reflected from the ground, meaning shadows won't be very dark (google image polar bear to see what i mean)