Very good portrait. Although I would let you in on a little secret. The width of about 90% of humans is 5 eye lengths. In this case, you made the eyes too spread out.
l--l x l--l x l--l
In the small diagram above is where the eyes SHOULD be located. But if you drew this off of a photo or a real person, I applaud you for the great work ^^
I know I should have paid more attention to eyes.. noticed that during shading and I was like SHIIIIIIIIIIIIIIIIIIIIIIIIIIIT!!!!!!!!!!!!!!!!!oneoneon1111one!!!!!
I tend to use that style where there is third eye on the middle of the eyes.
Playing a game for the graphics is like watching porn for the storyline.