Me and Yu

I was browsing on Leinil Francis Yu's deviant art page and found these pencils for a comic cover which I attempted to colour. Took me about 3 or 4 hours. Afterwards I found the final version that Leinil Coloured. His is a different style but also clearly done much better. Obviously I still have alot to learn about how light works but I am still pretty happy with how it came out. Comments would be much appreciated.
-Mark