So, to state my opinions on the skin colors, I'd have to go as follows:
While solar does have a better starting shade, fire ends up ending better. A mix of the two might be favorable.
If I had to choose between Peachy~ and Creamy, I would have to go with Creamy, as it's reasoning behind it to be the skin color of Cream the rabbit is far better than my color, which was just to look nice.
Between Sandy, desert, and brass, I'd have to go with desert, since it fulfills a sand color much better than the other two, with it being as bright as it is.
On the contest of limes, I would have to pick either Astroturf or Seafoam. The other two just have too rapid of a hue adjustment.
With Dark Blue and Ocean, I'd have to go with Oceans smoother range, even though Dark blue does have a nice looking beginning. Perhaps a mixture would be a good contender for Cobalt?
Right Dusk. It looks more pleasing with it being brighter.
Snowy has a better range, with hue shifting not getting in the way.
While I do like rose violet, it doesn't really fit well as a rosewood color like the mixture of pink and rosewood does, so I'd have to go with that.
Left violet is too sharp of a hue change on the dark end, while Right is too much on the light end.
I have no strong opinions on chocolate and sunrise.
Carbon, I'd have to pick the lighter one on the right.