nr 2, 5 and 6 (especially 5 6) look awesome but the render needs better blending (the contrast of the render does not match the contrast of the effects). but holy god, i love those effects!
i like 2nd and the last 2. the render does not match with the rest of the colros, but overall awesome affects and good job.
I like the 5th one the most personally, haven't seen a good useage of this kind of color scheme or style in a while, pulled it off great