The "I'm a movie critic and I'm smarter than you moron viewers" is very annoying.
However, I seldomly see a Best Picture winner and think "that wasn't good". I had no want to see Slumdog Millionaire last year. Then I saw it and it was excellent. And this year, no matter how much people say Avatar was good, it does nothing for me. I still have't seen it.
And I am just naming stuff off the top of my head, but as far as box office success winning recentlyish: Return of the King, Forrest Gump, Titanic. I'm drawing a blank now, but it isn't like they poo poo everything popular to look "smarter" than us.