Your sigs are all very cool looking. They're done pretty well. I like the colors and the structure. The effects were executed well also, alongside your typography. However, I feel like you use a render in your sigs as an excuse for using space. Obviously, you know plopping a render down takes no tallent.. Like I said, you execute it well, but I just don't like the idea of a huge render in the center taking up 60% of the sig, and a few effects thrown on top and next sig starts.. like a factory. Make your render at least less than 40% of your signature - and showcase your effects and etc. The sig you entered, however, I think is the worst of the 3 that I can see.