In Revenge of the Fallen, he was an Cybertronian Jet/Satelite, and we all have to agree that it looked AWESOME! But in Dark of the Moon, he became Earth car, but not any car, a Mercedes SLS AMG, and that was awesome too. But as a personal opinion, I would prefer the Crybertronian Jet/Satelite because being a Cybertronian vehicle brings an evil and more of a Decepticon look, where as the Mercedes SLS AMG is more suitable for a Autobot. I think what they should've done was keep Soundwave as a Cybertronian Jet/Satelitte and make a popular Autobot the Mercedes SLS AMG, perhaps Hot Rod or Blurr? That's my thought/opinion, what yours?