Love how you took other peoples advice and started working on this character.
Everything lookgs great.Make sure you check out as many tutorials as you can. Some popular ones would be i guess, im sure you already have checked these out...
1) One from pig (where he talks about deformation )
2) Smalls qalkthroughs on poopinmymouths site
3) That tut by athey was nice
4) I remember jay (jason lavoie) made a tutorial on how to make a low poly character
And also check out ref. and wires from inspiring and talented artists. Two of them on the back of my head would be slaught (slaughter.jimdo.com) and b11 (benregimbal.com).
As a quick ref. heres a model i made sometime ago.
The only thing i want to show you here would probably be how by rotating a 4 sided box 45 degress, you can get rid of the boxy look that you have right now. Low poly, esp., deals with the Silhouette of the model. Everything INSIDE the silhouette is painted in. So your primary and probably the only concer should be the silhouette and how you can add interest to it.... So def. check out inspiring arists and try to study their wires and try to see why each and every freaking tri is there/not there (as there will def. be a reason)
Good luck,im SURE this will rock.