The lighting isn't doing much, it's just a white blob, and not very well placed, or colored. The neg space it good for depth, but crop that side a little, cause, quite frankly, it's F*ukin huge. Your effects are good, you have some good c4d usage, to me. I would say add some more, or some more effects, and blur that for depth. Andother thing is the text is small, and it seems to be just thrown on there. I like the style of this overall, very grungy, and the stock suits it, but this could have a little more color, IMO. I like tags like this. Good job on it.
First of all, it's way too monotone and flat. That's the first thing I noticed. Seriously man, I just don't like this at all. Mostly because of the huge black void that is definitely taking over your tag--furthermore, the white light at the bottom isn't helping much. Your depth is off, as well. I'd try adding some shadowed C4D's (explosion effect C4D's), and then blur some of the outside bits that aren't around the focal. The flow s very strange as well. The right shows a / flow, but the rest of it gives me a \/ flow shape. It's not good here, though, since the light isn't at the center...at all. Also, work on your focal/stock placement. It is clear that you put your stock WAY over to the side. For future reference, having it on one side is good, yes, but not too far over. If you need furthur explanation on this, type "Rule of Thirds" into google and you should get some Wiki results on it. Keep working at it, man.