well the model itself isnt bad, (it does have its problems though)
the head is mishapen, the hair looks,..well...wrong, in general the head is the only problem with the actual model, aside from the arms u use in practically all your edits
but the skin is horrible, the pants look stretched, the boots are blurred and the chest is probably the only part that looks good, if it was in my possesion id remap and skin the whole thing
if you reskinmapped and reskinned this model, the quality of the skin would overgo the flaws of the model to a great extent (trust me i use that technique alot)
but if you dont know how to skin map, then just find a way to get the pants a solid color cuz those squiggly lines aint workin for him, and fix the front of the boots,
summary---
redo the head and hair completely(if thats the shape of hair your going foranyways), and improve the skin on the pants and boots, (remapping if posible)