1st one is decent 8/10 I like the colors alot 2nd one is great 9/10 nothing wrong with it that I can see Your avatar gets a 11/10 for obvious reasons My newest (I think that I may be improving thanks to all the help I get from here but I'm still a cs2 nub)
8/10 pretty, but your brighter colors could have faded out more easily into the rest of the sig. 6.5/10 i can see the way you use the motion blur. the render could have been smudged/erased more into the bg. 7.5/10 text is a bit too big. good blending tho.