not bad.. some things I would change is the text and then maybe add some more coloring.. say .. gradient maps etc..
Firstly, take out the little squares the the left of him, they take away from the flow of the sig, and I'm just not feeling them. Also, the Tracy text stands out a bit too much, you should blend it in a bit and move it closer down towards the McGrady. The C4D usage is alright, and the lighting is also good. Good sig overall.