It's the whole upper part of Harry that I can't look away from. His hair, the expression on his face, his eyebrows, the light at his temple and the back of his neck, his ear peeking out of his hair, the line of his jaw, the shadow across his chin that looks like it might be a 5 o'clock shadow, his adam's apple, the muscles in his shoulder, chest, arm and hand... He's just abosolutely perfect. And Snape being such a contrast to him! I especially like that while HArry's whole body seems to catch the light, Snape only glows a few small places. Seems very fitting to the both of them.
Ok, now I've written a book here, but, yeah, I think this is my fav of the art posted so far. So beautiful.