Wow. It's perfect. Utterly brilliant. Stupendous. His expression is perfect. Those eyes - pure evil. Yet he still looks wise. This is quite truthfully the best and my favorite picture of Sauron. And this could be the form he took in Numenor as well.
And I like his robes as well, and the dark background. Perfect, perfect, perfect!
Brilliant! I really love how you captured him - so young, innocent, and fair-seeming, but that posture and expression put the perfect sinister touch to him. I love the design work of the gold embroidery on his clothes, too, especially on his collar. And I like how the gold band hints at the One Ring's design. Amazing work. Love it!