Welcome to Gaia! ::

I really dig at how razor sharp crisp you make everything, that's some crazy control biggrin

I think it'd be interesting to try some different color combinations to show more of a mood and/or theme? Sometimes I feel the skin is too contrasy or feeling too much like the way some people use the burn tool for shading. Maybe throwing some other colors into the mix like cooler colors in the shadows might help in adding that extra element. Or even playing with hard and soft edges or if you're masking out the different areas of color to have some subtle gradients to add some variety.

Overall though I love your line work. In the first you've got some play between thin and thick lines and I love it when people add those details biggrin

Oh I'm envious of your talent. lol
I like the furry shoulder section of the first pic. Nicely done.