I never get those sigs but i guess its cool :D
I think your main problem is the flow. Although I understand it's something for a clan (something not the mightiest art-eyes get to see, no offense), it can't just be a C4D scratched on a Black BG with a Render on it. It need more effects, the Render need to be part of the piece and not just another layer.
Your second problem is Text. Just because some Font looks nice it doesn't mean it matches every Signature. Simpler and smaller fonts are the thing to follow in this cases (well, in my opinion most cases). Also, You seem to be having problems with Text Placement. "Death Bolt" in the middle, messed a bit with the BG and taking most of the attention of the signature? I think that's a no-no. Also, your name should be a bit smaller (since it's on a corner, I assume it's kind of a secondary-point).
I say 4/10. Overall you need to look at some tuts and work with flow. What program are you using?