For a humanitarian, Sean doesn't seem to like people much. The hothead's run-ins with the paparazzi are the stuff of legends -- remember when he hung a photographer over the balcony of a hotel by his ankles in 1987? -- and he's notoriously difficult to work with on set. Maybe Sean's still bummed that he had to give up smoking cigarettes (he reportedly smoked four packs a day) on his 40th birthday due to health concerns. Whatever the cause of his inner turmoil, we don't think we've seen Sean smile since he played Spicoli.