Excellent work!
5/5 Textures
Clever use of opacity to create variation.
High quality material with diffuse- (*doh*), normal-, gloss- and specular maps! No technical mistakes like 48 bit color depth that waste memory.
5/5 Preview and Presentation
Pictures with presets and good light.
(Careful with black hair characters on black background. Can look bad if there is not enough contrast. It's okay here, but I think this could be better. In this scenario place a light above her to give her hair a 'shine' or behind her to make it look more like an outline. A trick used in movies. But I'm very nitpicky here - sorry :)
5/5 Presets with variations
Classy style choices that make sense.