I don't like how on the smaller pictures, the sunglasses are used as focals twice... Keep the last one the same, the middle one should be moved to the left to show a bit of the undershirt and the top one should be of his chains maybe... otherwise, very nice! Keep it up!!
Also, on the shoulder and left arm near the bottom, it doesn't look very good with the blur. I don't know if it was intentional or just remnants from rendering your pictures but it makes it look dirty...
What is with you and tutorials? Not everything can be learned from step by steps. He has to figure some things out for himself and with your other comments about clicking random buttons, that's the usually best way to learn, as illustrated here.
The only thing I dislike about this signature, is how plain it is. The white background makes me feel like this sig is too plain. I do like the idea of the boxes on the side, and as VisionEx said, you do need a logo. Keep up the good work.