I like the background, but it needs more blending. Kinda looks weird that Optimus is just too down low. Raise him up a little The text is better, but we still can't see the 'O'.
Where is the "O" in "Optimus"? Anyways... Its okay. I don't like the text, try a different size, and maybe a color that matches the sig. Like Frag said, the focal is over sharpened, but i do like the blurring in the BG. I also like the C4D you used by his arm, looks pretty good. The darkness on the left of his body looks pretty ugly. For size, try knocking off 10 or so pixels off the top. Looks a little off.
Ah, me likey! Make the O more visible, but other than that it's quite cool. And like L0CK said, 10 or so pixels would make things a bit more even. I like the colors, though.
I don't really like the blue mist ****. When you removed it the explosion looked overblurred. That explosion just bothers me ;D
It bothers me too, but without it, it looks even more weird. Anyway, thanks for all the comments, i'll make a new version - try to sort out the 'o' and trim it a bit, thanks everyone EDIT: two new versions. one more coming. EDIT: all done, couldn't do too much cropping other wise it cut of sharply, and looked random. any better?