Hi
Nowadays i am working on a human head. Actually, in the workflow i realize that my base mesh is not 100% correct so i am working on this one as a practise. I am planning to finish this one and start to another immediately. So welcome to any comments…
looks nice, nice ear, the tip of the nose is little boxey though.
good start 
try to smoth it up a little it looks “clay’sh”
and if you are a begginer, there are a few templets head in here you can dowlad and sculpt. they are great if you just wana practice and not worry about topolgy.