My friend @simonhall751 suggested that I add some grey tones to get that look of pallid vampire skin. He is a phenomenonal Artist who works for Madame Tussauds, so when he speaks, I listen. I think it's a good idea and it has worked well on this piece, adding a more subtle level to the colouring. As I develop as an Artist, I would say my focus increases on adding detail, lighting, and texture to my artwork in general, working more on the overall rendering.