Should work on your render settings, try adding some lights to your scene and give the model a dark texture with some boosted specular and gloss levels.
The lighting setup and material still aren't very flattering. And it's making it hard to properly judge your model. I'd either use marmoset or get rid of the lighting and just use the default max viewport lighting and a dark material with like 60-70spec and 10-20 gloss.
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And i'm still bad with lighting setup
Now it is time for low poly!
I.e. this http://i.imgur.com/eAtyvKL.jpg