I have not liked any of the previous movies, but AGE OF EXTINCTION has thankfully jettisoned one key ingredient that made the others particularly irritating: Shia LaBeouf's Sam Witwicky, a character I always found thoroughly insufferable and unlikable. (Gone too are his parents, equally unappealing.) I can not be alone in thinking Sam, with his faux-boyish charm and supermodel-hot girlfriends, was a