I reckon this looks awesome. I see what you mean with the darker look, even in the presence of the saturated colors.
My two cents: I see a lot of saturated colors, but no bright colors. I think yellow is the brightest hue we can safely mix without de-saturating it too much, so the eyes especially can be pushed a bit brighter, as well as the orange feathers.
The blue skin and the armor scales on his back can probably have some specular highlights with white / off white added. What do you think?
The other dark think is the dark gold scepter (? I don't know what that is), this could maybe do with a lighter version of gold.
The last thing I see is that you are taking the photos in front of a white / light background. Have you tried a black / dark background? That should make the colors pop more, I think.
All of that said, this looks awesome! I wish I could get the smooth finish you are getting.