First post... need crits

[stylus]

So, I'm a little nervous posting here seeing as how this is the heart of Gnomon. A great sea of artwork... then there's me. But, that's why I'm here, hopefully to make my pieces good enough to swim in that sea. So, here are some conceptual pieces I've done for a movie project.

This is a stealthy superhero-ish character (this one's too big, so I'm linking it)
http://www.ualberta.ca/~ansun/images/stray01g.jpg

This is a concept for a burn victim
http://www.ualberta.ca/~ansun/images/stray_face01c.jpg

This is a sell-out superheroine
http://www.ualberta.ca/~ansun/images/super_sparkle02.jpg

And here are some life drawing studies that I've done in the past few days.

http://www.ualberta.ca/~ansun/images/anatomy01.jpg

http://www.ualberta.ca/~ansun/images/anatomy02.jpg

http://www.ualberta.ca/~ansun/images/anatomy03.jpg

http://www.ualberta.ca/~ansun/images/anatomy04.jpg

http://www.ualberta.ca/~ansun/images/anatomy05.jpg

[stylus]

A couple new ones. The second one is a drawing for an average guy who wants to play superhero, but doesn't know where to start. So I looked up products for his first costume such as a balaclava, paintball mask, hockey shoulder plate, martial art arm guards, and military-style pants and boots. I'd like some crits on it before I get too far into the piece.

[JasonRoll]

I think your drawings are great, but you should work on the lighting for your scenes.