by far your best texture
strong concept and design
the little things make it awesome, nostrils, contrast, the slightly harder lines on the forehead
maybe lacks a little depth under the helmet, took me a while to realise that its a face under a visor
great work
I actually sat here and looked at it for about 2 min. Before I actually realized what it really was, maybe you should somehow make it more clear with the visor part as Ben said.
Great detail, loved the concept and overall an amazing texture.