There's not much I can say about the sigs that hasn't been said yet, but I would just aim for some more consistency between the text and the background (both of which are cool, but don't entirely go together well). It looks really cool when the text is almost part of the background, but still very readable. One thing I do is just create a selection around the text, delete it, and then i've got the selected space to work with while maintaining the previous texture, which I can manipulate however I want. I find it yields excellent results in text-background consistency, and still looks really cool. Also, on the second one the guy on the right is really hard to see. They look awesome though, and tbh most people probably won't notice the things we did.