One of America's greats of the silver screen, he throws himself at every role he plays with his whole being, he has never phoned it in. And he can play it over the top or understated with equal pinache. Along with Michael Caine he is having one of the finest "third acts" in the history of movie careers, selecting roles that capitalize on his age and experience instead of denying them.
UPDATE: OK, I just saw The Bucket List on TV. So he's phoned it in once. I also started to notice that he's beginning to look like a Muppet of himself.