FLAT
The eyes are not clear enough! Make less shadow around the eyes or give them some gleam!
pic
i like the style of the texture very much, but it has a big lack of depth..
just my opinion
to show what i mean :
pic
sorry for using it without permission.
i just wanted to show you what i meant. the flesh looks like its on the bone not below it on your version, when you add more highlights and darker parts, you can make it look like its behind the flesh very easily.
The eyes are not clear enough! Make less shadow around the eyes or give them some gleam!
FLAT