Wicked!  Mega-respect to you, for sculpting from the ground up.  What sort of visor will you use, so as not to hide his face?

If I could offer any criticism, it would only be that he looks a little pop-eyed.  Of course, he could be looking into the star gate for the first time, like Dave Poole in "2001"

But my hat is off to you!  I'm trying to teach myself to sculpt, and I appreciate the effort that goes into it.