First Wallpapers- Need critique!

I got Garry’s Mod a few weeks ago, and have been making multiple wallpapers that are, in my opinion, pretty good. (I suppose that’s what most people would say about their own work, though…)But i need to see if I’m doing things right. criticism will be gleefully accepted, along with tips.
http://img25.imageshack.us/i/gmconstruct0019n.jpg/
http://img638.imageshack.us/i/gmconstruct0016.jpg/
http://img28.imageshack.us/i/gmconstruct0006.jpg/
http://img687.imageshack.us/i/gmatomic0003a.jpg/
http://img171.imageshack.us/i/gmatomic0002.jpg/
http://img21.imageshack.us/i/gmatomic0001.jpg/
http://img195.imageshack.us/i/gmatomic0000k.jpg/
http://img8.imageshack.us/i/gmflatgrass0003z.jpg/

Don’t use flatgrass or construct and you need to improve posing, keep trying :stuck_out_tongue:

Improve