just bad

you're fine
just plain
very plain

yea cud use some more PIZZAZ. in the background.

not bad, could use improvement with flow and blending.
you see where his cape or whatever curves upward at the sides? put something behind him that compliments the flow of the cape, a c4d, brushing, whatever. if you do it correctly, it will make a \ o / type flow where the 'o' is your render, and it will make the sig that much more appealing.

needs more to add interest.
and of the two you posted i like the black bordered one better.