haha, yeah i bet their front lawn is covered in robo footprint damage, hahaha.
all-time fav eh? well, prime is the default choice for everyone i guess... so i'd have to say GRIMLOCK baby! i love that he's a dinobot leader, but also an autobot, so must still abide under prime. i have this comic where prime and grimlock were constantly bickering about who to follow, but in the end, grimlock swallowed his pride and let prime take the lead.
he's big, dumb, and loveable... plus, a robot dinosaur has got to be the coolest 'transformation' form ever! not much of a disguise in the real world, but epically cool nonetheless.