Optimus was the best thought out and achieved. Now if we could just get him to add a motorized wheel system so he not only transforms but rolls out as well it'd be perfect. As nerdy as cosplay like that is I also think there's a lot fo ingenuity there. Not just attention to detail but also genuine creative thought that goes into how to make the costumes dual function like that.
the wheels did roll didn't they? just not motorized. Motorized would freak me out. Dude drives in, and when you're least expecting it, pops up and scares the crap outta you.