1) Dont like it. The font isn't good, the background kinda fits the render but at the same times makes your eyes drop ._. 2) The idea is well done. The font is ok since its the Kingdom heart's font, but the color isn't good, doesn't fit the rest of the sig, and it's hard to see.
3) Its pretty good, the renders are ok, and the font color is ok. And the background fits too. I dont really like the font of 'Rukia', but thats a detail.
And as always, small sigs are better x3