I like the back grounds on a few of your sigs, but one thing that i noticed about them is they are not really balanced you have alot of stuff going on on one side of the sig and the render is not quite in on the action or is a loner outside of it(i could be wrong though). Need to work on blending the render with the background i say this to alot of people, so ill say it again (not to sound rude), try working with your render when you progress it with the background, if you finish the background, then paste the render in and then start working on it, it wont flow well, also if using photoshop try using the gradiant maps, (if you need a explaination on it look up on google or pm me about it) im not sure gimp has it or not, try using diffrent filter, FILTERS= GOOD, lol. i do like the animation you did, i have a nitmation graphic i did years ago, never was my forte, but i agree with the others wait till your accepted to post them, because if its a bad animation it could affect decisions. Alot of your sigs are bright as hell, try toning them down or applying a gradiant map to em. Im not sure how you do your renders but if you only have one render layer try making multiply smuding them adding overlays and screens one on top of another also dont be afraid to use a eraser tool if something doenst look good in blending backgrounds with renders. Hopes this helps if you need anything dont hesitate to ask.