Thats really awesome. I like em all. I would want to see how it looks like if you blended the sprite a bite more and "destroyed" it a bit. Maybe have some of those vectors going over him to create better depth.
Yup it looks better without the render at the moment, but if you blended it a bit more t would look great. This sig looks amazing already though
I can already tell you make some neat abstracts. Only thing I can complain about is the borders, just not feeling the color or even a boarder being there.