nice move
2 things to check:
look if legs, from floor to crotch, are somewhat as tall as from crotch to top of head...looks like not.Also, from middle knee to crotch, and from knee to floor, use to be same distance, which here the latest seems shorter...havent measured, tho, you can if grab screenshot and use Adobe ps rule tool and info window, or , use simple marquee windows and info window in any 2d package. Or if eye is already trained, just look at it directly.
not sure, is late and am sleepy...
you can kill some polies in the interior of elbow, opposite side I mean...elbow yep, there dont remove, as elbow do weirder bends...
about separing a bit legs, yep, I do, as well as armas...but even the allways said to be wrong just arms full horizontal position..has its advantage in rigging shoulder...so, some o fthose things arent carved in stone...
but yep, generaly will be mor epainful to read if are near. In packages which allow grow selection, though, isnot so much issue.
Maybe if you make basic model and later specific elements are parts attached, would be better for peoples combines, or for their adition of their components, way easier for them than do a human and even more, rig it and animate. I guess your plan is only modelling tho.
attached parts maybe a prob with x format...tho can be attached...anyway, I envision irrlicht using in a near future b3d and md5 for all these matters, for less users pain...