The new one looks like u just added a render to a bg and a c4d ontop of the render. You should do something or add something to the left side so it doesnt make it plain because the right side seems to have all the effects and stuff and the left just has a plain color... You should work on trying to add a light source to your sigs because none of them seem to have any. -Foe
Some of them seems just too plain. The Naruto one, the render needs more blending... Basically a bunch of C4Ds in background with render slapped on.