I noticed you used my texture Brown
Very nice sigs, the diego one is better IMO. Your sigs dont suck man, youre improving, and in the end, its more about what the sig is saying/implying.
Your Michael Owen sig for example, is my favourite. The render is great, its kind of like hes looking up into Wembly while the quote kind of adds the picture of a childhood dream to the sig. The background is ok, and Ive noticed you started adding backshadows to your sigs kiu
I also remember you had a sig ages ago of Petr Cech, I liked that one
You should try some more texture and eraser effects on the render to try and blend him into the background. Also, I think it might be time for you to step up in your text and go for some more complex effects, rather than just writing the text in the sig. And you should get into the habit of adding borders man, a good border will work wonders for the sigs.
Dont bother posting sigs on PA, coz theres no such thing as a perfect sig. Check out the tutorials and resources, THATS where all the help is