how should i say..... erm plain??? the text stand out too much the render itself is not well blend and not much effects on the tag try using some C4Ds and read more tutorial....=)
At the moment I think the sigs are a little too narrow, think about increasing the width. That way the renders will probs fit better. So try and make something with a width of 400px. Have a look at some tuts to help with some background effects, try smudging and maybe clone stamp for some wee touches that will give your work a little detail
I've started doing more tuts and learning how to make Text look better. Yesterday was first time I used the clone stamp from a tut Ty for feedback.
Try out some tuts to do your work some good, I can see you know how to smudge, only you haver to work something more on the layer properties, also your renders flow into the BG isn't nice, smudge them as well into the BG to make a total package. Your text-skills aren't super well, try out the Battlefield heroes tut: http://www.gamerenders.com/forum/index.php?showtopic=397569 Hope you will learn something more