yeah number 10 is really good, the other are weird but they got a lot of potential, keep working on your composition.
Some are messy like 3,5, and 6. I like 8 and 10 however.. Although they aren't exactly shocking tags. I've seen the same effects in multiple sprite tags too many times already. I suggest working on their coloring and effects.
I have never been a fan of Sprite sigs, but those looks pretty good. My fav would probably be the 5th one down, minus the white border.
i myself like 4,6,7 and 11 (#7 the most). but yea i agree they all look a bit wierd, maybe work on your diversity a little. get rid of the borders on all of them. try some different colors and bg effects.