David Gregory's always a treat:
Scott McClellan: "Hold on, the cameras aren't on right now. You can do this later."
David Gregory: "Don't accuse me of trying to pose to the cameras. Don't be a jerk to me personally when I'm asking you a serious question."
Scott McClellan: "You don't have to yell."
David Gregory: "I will yell. If you want to use that podium to try to take shots at me personally, which I don't appreciate, then I will raise my voice, because that's wrong."
Scott McClellan: "Calm down, Dave. Calm down."
And, No. 1? I don't think you'll be surprised, but that guy has just soared to the top of the pile this year, overtaking many prominent annoyances from years past.