Wow, it's really good. Professional as well. Well done.

Aha! I've seen the reference pic now. Your head there is slightly tilted and the hair on this portrait suggests its not. This could also be emphasised with the shading of the left shoulder pad.

I've discovered something interesting about this piece, the two - top and bottom - halves look better separated then put together.

After seeing the ref I wanted to make an edit, but got carried away. Well, actually I did made an edit (http://img.photobucket.com/albums/v157/pembroke/pixeljoint/opacus_portrait.gif) but don't think it will help anyway.

Ah GAH! The power pack! I knew I forgot something :X
Thanks for pointing it out. Well, I tried to keep the perspective of my photo a bit, that's why the one eye is lower then the other. Futhermore I agree, thanks for the critique.

Vertigo: Yup, I'm not a player, but I love the universe.

Nice piece. The eye and hair-at-forehead outlines seem a bit hard to me. Your left eye is a bit lower than the right. There seem to be some perpective issues too. I like how you shaded the jaw and lips though. Good work!

Where's the power pack? And a space marine captain with hair is rare - besides the hairy folk (SW).

Nice :P you're a 40k fan? (Prefers Warhammer Fantasy)

Ah, all right. I kinda forgot about that lol :D
I'll fix something up. But I don't think I have a complete Wip (As in only lines, then colours, shades, detail.)

EDIT: Nevermind, I saved the lines and the undetailed one :D
Yay me

you have to have a wip animation

...In the weekly challenge topic...?

Where are your WIPs?