The refsheet I did just 2 months ago didn't grow on me like I hoped it would. In fact it kinda made me re-evaluate most of my coloring. Still not happy with the backview here but maybe it'll do?
Old ref below for comparison! My main goals were to make the face less flat and to find a different approach to suit shininess. I also ended up streamlining a couple things. Overall this coloring is heavier on gradients and lighter on painting, smudging and reflections/lens flare.