Let's start with the bad things, you could try blending it in better, try keeping the flow because you have it going one way then on the hand the c4d is pointing the opposite direction, create a light source, need to erase all that c4d from the face
Now for the good things, I like the depth you gave it, it came out really good and I like the color scheme you did because you sticked with it, I also like the text because it fits good....just fix those things and you got a good sig, right now it's a decent sig 6/10