Falling Down is one of those movies that couldn't be clearer about the point, but people still routinely miss it. I do like how convincingly a guy like Michael Douglas - magnetic as hell, with otherworldly charisma and every bit a movie star - transforms into the kind of person you'd cross the street to avoid.
But I think Romancing the Stone is my favorite of his roles, because it's trading on exactly the qualities that something like Falling Down subverts. This guy is a dashing rogue, a pulp romance novel counterpart to Indiana Jones' pulp adventure novel hero. It's a movie that embraces its hot bloodedness, a comedy that knows how sexy its leads are, and runs with that.