This sig has a nice feel to it... just a bit plain on the left and the text is in the way wrong spot. Should be under his right or left arm. Gj. :]
If you moved the whole thing to the left more towards the center but not completely in the center it would be good. And yeah like uva said, text should be closer to the render
the left side is a lil empty try filling it up and try not to have HUGE text of text that takes your eye away from the peice itself try to make the text part of the art not an addition to it