I like the muscle and skeletal structure you can see around the temple area in particular. The nose has a nice shape too. The ear seems a bit small in proportion to the rest of the head. Ears are surprisingly large when not covered by hair. They sit lower on the head than most folks realize too. Extending the ear up and back will help cover what looks a little rough behind the ear too. The bracketing around the mouth is a nice detail too.
Its quite good
looks well, asian ?, i think the back of the head should be larger, the neck and head backside are not straight equal normally.
He might have small ears, and maybe his cheek bones are a bit high, or else the shadow below it is at a high place dough that could also be an effect of the current lighting.
I wonder how you made this
I made it following cgcookie tutorial on sculpting human head, where workflow was like : low poly sphere --> roughly shape it as head(in sculpting mode) --> subdivide --> add basic key features --> subdivide --> add detail -->subdivide
At the end polygon distribution was not really the best, parts that needed more polygons had the same ammount of them as those that didnt need that many (example ears and mouth)