Mhmh, kind of a WiP since I got stuck of the fact of what to add/retire. So bring it on with the suggestions to finish this >:.
the first is better by far. just go into /Curves/ and add more contrast to it. And try adding text in either fonts; Futura or TM Cen MT Condensed.
First is better. Needs a tad more contrast, though. Tone down those hues in the shapes, as well. ;] I'd add some text. Something defined, like in "Arial". Or something bold that you can add some cutting to, or some layer masking. That'd be pretty rad.
First on IMO looks the best. The shapes have to much color in them and seem to be grabbing all the attention :( You could try working on the flow a little more, but besides that, its pretty good
The first one is your best. I like this because it has color mixed in with black and white, but add more color next time, okay? The spotlight, sun, that big bright light at the top, whatever, drop it. It takes away from the signature itself.