The lighting...
Just gives off such an evil aura to the character. I love how the head and arms look a little separated from the body. The only reason this is a 9 though is because of the background....
In what seems to be a shady Newgrounds office, it makes the demonic part of this p-bot seem less scary and more natural, thus taking away from his harsh presence. If the location was a scrapyard or alleyway, the picture would be just perfect.