hey man, this model is crazy, very nice!
there is so much detail in it, my suggestion is to improve the background, to give him more detail, the texture of the ground looks very pc like, unrealistic
I hope you're not angry, I played with your pic in photoshop and I think you can get more atmospaere out of it, I don't know if that what I have done is what you're looking for, but perhaps you understand what I mean and you're alittle inspired