Sig 1: 3/5 - 750K
This top layers of this signature are great. The text looks phenomenal and compliments the overlays really well. unfortunately, the render does not really match the rest of the signature. Starting with low resolution is pretty damning. For how sharp and crisp the rest of the signature is, the muddy background image really takes away from it.
Sig 2: 4/5 - 1M
Really interesting use of flares, shadows, and depth. The color control is very good, and the overly illuminated canvas is maintained pretty evenly. the name/number/psuedo background are really cool, and the flares look great. The top flare is a little strong.
Sig 3: 5/5 - 1.25M
Beautiful. tastefully restrained border, soft vignetting, and light dust/distress additions are really complimented by the limited color range, and even further complimented by the text in both tyeface, spacing and effect.
Sig 4: 4.5/5 - 1.125M
Great use of a vignette and overexposure to establish a theme. the wired/overlay to the right kind of fights it a little with the psuedo double exposure. the blurred background looks sharp and helps to add bit of depth, particularly to the text elements. the stripe's color choice fits very well, too. Like sig 2, the top flare is a little strong for how flat the rest of the lighting is edited to look.