For me Bumblebee is a bit different in AOE comparing the times when he was with Sam. He become more rowdy, even other Autobots are complaining that he lost his discipline, he become a bit nervous, emphasizing his independence. Of course I like him even in such appearance, but so I think these changes are due to that he is difficultly going through parting with Sam. He needs human friend whom he could sincerely trust. What do you think? Did you notice these changes? Does Bumblebee need Sam?