Unfortunately, we only got your design yesterday when we extended our contest. Apparently logo tournament was filtering/moderating your entries as a new designer.
Of these, we like #81. We've pretty much moved away from any use of a mark other than lines and swooshed so we'd recommend removing the "S" mark. We would probably remove the gradient but you certainly can leave it if you'd like.
You're the only one who has angled the "Signature" in their logo. We'd recommend going down that track some more by making the angle even more pronounced. Perhaps even at a 45 degree angle.