1st one in my opinion seems plain and boring, not enough detail and doesn't blend because of the scanlines. Text is a distraction point also. Second one is a lot better, aesthetically pleasing to look at, the colours are nicely blending, and theres a nice contrast, lighting is a real good job also. Text seems out of place again, and needs a bit more detail in the overall sig. The third one is my favourite. Depth and perspective are great, the flow is consistent in the whole sig, the lighting is nicely done, i can't really complain about anything much on that one except again the text is putting it off.
Just try get the text more in with the focal point, and just be creative with it.
Good job mate, your improving a lot.
He Who Dares Wins And i'll die to win, cause i'm born to lose Fucking Civilian