tbh the first two are a big no, can't really comment it, sorry but I dislike those sigs.. other two are good, but not finished I think, could use some more effects,
I like the 2nd and 3rd, I also like the smudging in the 4th but I agree with the guy above they could use some more effects (3 &4). The 2nd one could be even cooler if you used more effects since the bear seems to be "yelling" and the massive craziness would complement the render well imo.
3 is best needs a sharpen try using color balance layers to match colors on ur tags and bring out more colors