use some filters on the render to get it to stand out more (Gaussian Blur: 2.0, Fade Gaussian Blur: Try some different options), and the bg needs some different colors and more brushing. Text doesnt fit to well. 6/10
1st: 8/10 it looks nice but I've seen quite a few like it. 2nd: 7.5/10 very simple but looks good, maybe should've made the text stick out more
first 2 could use a bit shine or brightness 7/10 your fourth looks kinda weird i dunno about that one so im not gonna rate it and the green third looks okay but it could use more colour and depth 7/10
I'm gonna say 7/10 on both. The backgrounds need some more effects, and the text could use some blending, but nice render placement in both sigs. Good job!
It's got a nice kinda glowing effects on the render, but you can't really see much of the background (too dark), so 7/10. I like.