The textures look a bit stretched on the suit, and the rough polys on the round piece joining the helmet and the suit doesn't look intentional, but very nice rendering and good solid lighting, though I prefer Alien Dude 3 in terms of overall refinement and design >_> You do great work though. I'm only still just learning zbrush.
Thanks for the feedback! I'm still learning too! :-D I'm experimenting with ZBrush for about two months now. There's still a lot of try & error and I'm trying to improve and understand more. Still a very long way to go - but a fun one Glad you like Alien Dude 3, he's happy to hear that (and we're not telling Alien Dude 4...)