My favorite movie of 2010 would have to be Wall Street Money Never Sleeps. That movie was a great movie and I learned a lot from it that I never knew.
My favs for 2010: When in Rome Universal Soldier 3 Valentines Day Alice in Wonderland The Runaways Kick-Ass Robin Hood Prince of Persia The Sands of Time Twilight Saga: Eclipse Easy A Harry Potter and the Deathly Hallows: Part I Black Swan Out of all these great movies my best would be a toss up between "Easy A" and "Black Swan".
For me it is definitely Inception. what a great movie it is. I think it is best not of the year but also best of the decade.