In addition to his Vulcan-like detachment, Shockwave is known for a few other characteristics within the Transformers universe, the first thing being that he's the robot who turns into a gun. Not a car, not a semi-truck -- a giant space gun.
Perhaps because of these traits, he was also named one of the 12 most ridiculous Transformers of all time, compared to the socially-awkward loser kid who you were always stuck with on the playground. (He also only has one eye. What a freakazoid.) Well, just see if those mean kids are still laughing at the end of Dark of the Moon!
(Click for character banners for Shockwave, Optimus Prime, and Bumblebee.)