Even though the movies gave me both my favorite character (Sideswipe), and probably the sexiest rendition of the Corvette I've ever laid eyes on, altogether into a mash-up of unseen badassery unforetold by any of my forefathers, my vote goes to Prime. I love the movie designs, and I appreciate what the movies have done for Transformers overall, but this isn't solely a beauty contest. Prime has a story that blends better than the movie. In Prime, all of the robots are getting some kind of development, especially Starscream. IMO, Starscream really got the shaft in the movies. He usually is a dynamic character who would do anything to get into Megatron's position, sometimes kicking the poor sap while he's down, something I kept waiting to see in DOTM, but instead got to see put down like a dog.