I think the one you did for Ratchet is the best. It's simple, non-excessive, balanced, and works perfectly for the theme. The rest show promise, but are a little unorganized. Is the two-tone barcode with your name your logo? If so I think you should play with it a little until it becomes more unique. Also, the tiny unreadable type is associated with the aging technical look of design, so I don't really see how that fits with the "grungy" look of your Hellsing sig. The Dakilla one is nice, very balanced, but I think that the BG could use a little more color depth, and I think a different font would be better. You get big points from me for using a Hackers quote in the last one.
"Yo, this is Zero Cool! I thought you was black, man."
Good times.