2011 was the year of Boat Cop, and one comment exemplifies my favorite thread of the year. Congratulations to your friend and mine: commenter atomic!
And an an honorable mention goes to Kiala, for a comment that is elegant in its simple versatility.
(And okay look, I know I started slacking on Comment of the Week over the last few months. I'm New Years resolved to be more consistent in 2012.)