I will give criticism.
Firstly the picture of Messi isn't blended into the image enough, which I suppose is hard to accomplish with just a stadium stock as the background.
Secondly I think a sig always looks better with a border.
My last point off the top of my head is the text is too dull, download some new fonts to use on Photoshop
Please be honest well you always are
How do you think my Sig's are ???