Hmmmm... that second one is much better..nice progres Crystal
Make it's lower arm less thick, beeing ticker in upper part and going tinner down.
You have it as thick as upper arm.
Also lower leg should be little bit smaller and upper longer.
Add few hairs at his back, seems that when you were modeling them you were looking only on his front.
His chest is already better than at the firsth version, but may be you can do it little bit wider. His torso looks flat.
othervise it would be already used in small game, good work
If you want to know little bit about body anatomy you can look at
http://www.fineart.sk/index.html or directly
http://www.fineart.sk/body5.htm
There are even some tutorials included. You don't have to make models like those you can see there, but may be you wil get some inspiration there.