Digital Art Did it without a tut so bear with me...

Yeah, so whatever help you can give will be welcome. I know a lot of you thought my old style was getting old, so I decided to give it a rest and try something along the line of stocks, and, well, this was it. xD

EDIT: Well, I was playing around and got another decent sig, so I thought I'd put it up and see what you guys thought of it:

 

its rly good i like it :)

 

I does look good but I think that you should add some foreground effects working with some pentool down low in front of the subject. Or add some clipping masks on in, with the effects you add, try and make them flow in some way. Also try and get the lighting to flow as well. But not a bad tag.

 

It's nice. Try to add depth a bit, sense the render has depth. Try the blurring a bit, it'll help. Try to add more flow, the first one seems a bit random. But wow, they are hawt. The second one's color is a bit too bright, if it was a bit less, it'd be better.

 

The second one is pretty monotone, and in the first, the stock takes up too much room.
Shrink it, add some clipping masks with a splatter brush, shrink it with Control+T, and blur. Put it toward the edge of the sig. A c4d with small fragments works equally well.
Also, try not to make the neg space act on the render. Some light would look good too.