When you hear Peter Cullen take his voice into that low, gravelly register and boom out "Autobots, transform and roll out!" as Optimus Prime, it's hard not to get goosebumps. At least, it is if you have any sense of nostalgia, consarnit.
This video has a few looks at the upcoming Transformers game from Activision, and Cullen talks (briefly) about how he came up with the voice for a giant 18-wheeler robot leader, and some of his favorite lines from the show.
Now, where's the Starscream retrospective and video documentary?