The House signature is the only one that really catches my eye; I see this kind of style ALL THE TIME at graphics sites, and it seems like everyone just sticks to the same thing. Smudging could go. Many of your signatures really are busy, and I had to look closely on the last one to find a focal. Pretty good stuff, though.
They're all pretty well done, I like them.
Though on the Samus signature, I think that the splatters didn't go so well, I think perhaps it would've looked better with less splatters.