Those trooper models need some work.
BolesRoor, thanks for posting the pic, that helps. I also agree with everyone that they look a little pudgy. The troopers in the foreground show that Kyle's taller than them. (?) It'd be a lot more intimidating if they were at least eye-level. Of course, Kyle could be jumping, but I doubt it. The Stormtroopers in the background look like they're porportioned correctly, though.
I think what else is going in is that their faces look like they're smashed in like a pit bull. Having the crease down the middle come out more would help.
On a positive note: That rifle is perfect! And in the other screen: the way the probe droid blows apart is awesome!