11. Sean Penn, 'Milk'
If Sean Penn's Oscar win for Mystic River demonstrated his wiry ferocity, his turn as slain gay-rights activist Harvey Milk illustrated his sweetness and compassion. In a career personified by playing tough guys (both onscreen and off-), Penn displayed a rare gentleness here, which doesn't mean that he wasn't any less steely in this role. Indeed, Milk is a sort of coming-of-age film that follows its hero on a path to finding himself and, at the same time, pushing others to accept homosexuals into their communities. Penn has perhaps never been more lovable, a quality that's rarely been associated with this actor. But look how well he wears it.