Eternal Sunshine of the Spotless Mind is the critics’ choice so far.
Slate has an interactive guide to the best movies of the decade. It tracks the critics’ lists and assigns points. Sort of like the BCS rankings, and just as useful.
[I use Ought in the title to amuse myself. I see the term from time-to-time in these decade wrap-ups, but I scarcely saw it used during the actual decade. Which brings to mind another question, is 2010 part of the “Teens”?]