This is an older design drawn by  IgorKutuzov06 of RoboMatt.
"To sum up him concisely, RoboMatt is supposed to be human me as a robot.
He's made of heavy-duty steel, rubber, and all his parts are highly durable, easily repairable and easily replaceable.
He's basically a robot with a human mind in his microchips and circuitboards~"
To give a bit more finite details to explain things, he's not as flexible as you or me, but he can rotate all of his limbs and joints completely around. His shoulder connection is designed like the film winder on a camera (http://www.mir.com.my/michaeliu/cameras/nikonf/fbody/images/rewindcrank.jpg). It allows him to achieve an expanded amount of mobility as far as arm movements are concerned.
His design is a mix of cartoonish and realistic. Cartoonish in that he looks like a cartoon character due to his simplistic design and construction, but realistic in that he both resembles a humanoid and possesses a similar amount of flexibility.
His parts are all easily replaceable or repairable if they should be damaged or break off. He's very ruggedly built, with only a few robust moving parts, and his computer brain is located in his midsection for safekeeping.
He's friendly, kind, honest, and loyal to those he cares about, and very much enjoys simply being a robot.

If you have any questions, please ask! I like questions. :3