Quote: "Wait 'til Alucard gets here, he's the human proportion critic."
I'm here now!
So yes, the proportions of that model does look pretty alright, I'd say that the legs are a bit too small but otherwise it's pretty good, the issue you are having is with the wireframe, on organic models you want the edge loops to flow with the muscles of that thing that you're modeling, so if you're now modeling a human you sort of want it to flow nicely through the body of it.
It might sound hard to understand or whatever but take a look at this model (Sorry for being all smug-like and showing my own model as an example, it's not perfect obviously, but it gets the point across.)
See how the edges are sort of flowing with the body? That's what you sort of want to strive for. If you're coming from mechanical modeling it might be pretty hard to get this idea into your head but keep on trying and you'll make it!
Alucard94, the member of the future of the past.