1st Signature - 7/10
Why? A little too dark, think of more light and bright colors. Simple for advanced photoshopping. Done the same thing before but with different colors (no dark colors) and with less bevel + different gradient and font. The percentage amount of bevel you used doesn't suit the font + signature itself (make it a little lighter). Good thinking. I certainly do like it!
2nd Signature - 4/10
Why? Okay this one, in fact i'd say that you used too much light blue. It'll be good if you add a little dark blue to it, and remove the frosty, icy thing cause it ruins the whole thing. Maybe make it smaller? Especially at the bottom where its not spiky anymore :l XD. Better luck next time!
3rd Signature - 5/10
Why? You wanna make us blind? Hah. Just kidding! Anyways, i actually do love the 'C' and the 'A' in that font! :3 But, your using triple reflections which doesn't and will never make your signature that perfect unless you use a light one in each level. It just goes on and on and on. Its too bright! Each level has the same fade! Haven't got anything else to talk about though so maybe others will notice.
P.S. Im not that much of a professional at photoshopping but i do know a lot. Thank you and again, better luck next time.