Your tanks seem fine to me, but I'm not into military stuff, so I can't really comment. Realistic tanks all look the same to me, so these are all good. ^_^
I like your little character! He's veeeery smooth though... how high is the polygon count? Is he made of lots of little pieces, or is he one seamless model? I presume you're using parent/child rigging, which works reasonably well I suppose, especially for a boney alien type dude. It's cool though, I like it! ^_^
I'm using Ultimate Unwrap for my textures. It's still a pain in the arse to unwrap the character, but it's worth it in the long run, because it improves the quality of your texture no end. It also will come in handy later on as a file converter, for getting your work into B3D format. Unwrap 2 (released a few weeks back) adds a lot of improvements, and it's a great tool all around. Well worth the cost of $35...
http://www.unwrap3d.com/Alternatively, there's a tutorial floating around about using the seperation and flattening technique. Basically, after duplicating your mesh, you cut your mesh into sections and flatten them out and lay them out in the top view. You use these to capture a Planar texture using Texporter, then morph your pieces back into the original shape.
That was the technique I used before I got unwrap, it was a bit of a pain though.