Pointed Chin, flat head doesn't mix so well, try and use a "m" top instead, like http://a.imageshack.us/img713/9105/sug1.png, It breaks the illusion alittle of a flat head.You can also make it rounded, depending on what you prefer.The SNES sprite however looks damn nice.^^What reference did you use for the portrait?
Try and round the hair that works as well. And somehow that face reminded me of a game, but couldn't pick which, Guess it might be from there. Let me guess, Tōshirō Hitsugaya from Bleach DS game?
Toushiro and Yorouchi has the same face build so doesn't matter. The rounding looks better, but it still looks off on the top head part. Also, try and add a third skin tone to help elevate the 2d face.