hmmmm, there's a lot of waisted polies in the ears, also, i'd recomend that you never make more than 4 sides for polygons, ive see a lot of 5 sided, and even more on your model, it may look right at the moment, but models usually are rendered using triangles, meaning between every 3 verticies in a face there exists an edge. So it makes your poly flow messy =\. Anyway, keep it up, looks pretty good apart from that, very good for a first =]