no one seemed to mention it looks monotoned. so i will.
it looks monotoned...
also imo your lighting is too intense and should be moved towards his forehead, if you study the render you will see the lighting is more intense on his forehead then it is between his body and legs.
I LOVE the slight wash out effect maybe it would look better as a dark purple or blue. just to cool it down a tad and to add a bit more colour.
the glowing effect on your light spot is unrealistic and just looks plain weird in my eyes.
one more thing, if you look carefully at the c4d's behind him (the ones his leaning on) there is a lack of depth right there in that one little spot, his leaning on the c4d's but technically there is nothing there for him to lean comfortably if you know what i mean.
anyways thats just my opinion, i do like it allot