I love this signature. I like the light striking down on Naruto's face; giving a whole new perspective to the signature. The backround reflects on Naruto's mood, seen upon his face: dark are vibrant.
The whispy text could be repositioned to a more natural place- though at a glance I see little area for movement. The base picture itself looks somewhat shiny, and three-dimensional.
-1 Reposition the text
+1 Backround
+1 Base picture
+1 Perspective
+1 Text font.
Starting at 5: 8/10.
Well done.