The background is odd, but you're getting there. It seems that it's choppy, or that it's got some kind of effect that divides it into separate portions? Something along those lines, but it doesn't seem to work with the background you used. Other than that, I love it. The render is awesome, it's very respectable in my opinion. 8/10
Your background doesn't look so nice, i recommend to use C4D's much better than brushes, brushes are ok, but not to much
Uhm, brushes are other peoples work too and in my opinion are harder to make decent than c4d's . And your signature: It's very flat, meaning there's no depth at all, second remove the second ironman behind the render, it's confusing and third it seems to miss a lightsource. Go read up some tutorials and you'll get better