Overall you've got the basic drawing part down, you should focus a bit more with detail and as many others have already said change his outlook. He appears rather girlish in your drawing. If you get those down it'll be perfect!

Same thing GTK said pretty much, nice coloring job but...he does look rather girly.

some of the proportions are a bit off *head too big*, but other t han that, this is really cool~ He looks so smug ^^

Very nice, the only thing you could improve on is how you draw the difference between a male and female face. This is difficult to master, but worth it. Kurama looks like he has a female-looking face in this. Not being rude! Just offering advice.