Denzel Washington earned his sixth Oscar nomination for “Flight,” a film in which he delivers a brilliant portrayal of a booze-and-drug-addled pilot who crash lands a disabled airplane. The great thing about Washington is his characters always have enough depth to move beyond movie archetypes, and his drunken pilot – Whip Whitaker – is no exception.  Ultimately, “Flight” isn’t about an aircraft crash. It’s about Whip’s demons, and the movie offers a surprisingly realistic view of addiction.