Im a bit too lazy atm to link all the images so check out all my recent work through my DA please http://krucifiks.deviantart.com/
It's good to see you're using your own c4d for your sigs. But maybe try to use less of c4d in your sigs?, on most of your sigs the c4d looks out of place to be honest. Sometimes less is more My advice would be to just keep practicing and maybe try out some tutorials and experiment alot, don't just stick to signatures. You could try some large pieces or maybe try some other styles and techniques. Anyway, i do like most of your sigs though. Screamo is very nice and Childhood memories also. Good job, keep it up!