Now Matt I've watched MOC advice and I know how you feel about using a character's backstory to justify their appearance. But it's not being lazy if the intent was for them to look like a pile of trash from the beginning
To answer any questions this is supposed to be the turret from TF2 http://i.imgur.com/1P6tQCh.gif http://tf2wiki.net/w/images/7/7d/Lvl1sentry.png
Not much is known about his story. All that he knows is that one day he simply stood up and started wandering a trash dump until he found an old busted sentry turret and got it fixed up. Some people speculate he is some kind of Frankenstein's monster created by some mad scientist hiding out in the dump. Others say he is the reanimated corpse of a worker who was crushed in a trash compactor accident. Either way he wants to learn more about himself, and sets out on a quest of self-discovery. Along the way he becomes one of the most feared mercenaries out there. He is quite the gentle giant, always patient with others but sometimes a little dull when it comes to social interaction.