Stop bashing Avatar. If you don't get it, fine. Just STFU !!!

I saw Avatar in Imax 3-d. Thought it was amazing, and the best $30 (went with the girlfriend) I spent in 2010 so far. But I didn't go rent a megaphone to tell the world. Why is my aggravating co-worker telling everyone she can find that "it was okay, but it was long. And I didn't get it. And why do the people look like cats?" I want to tattoo STFU on her forehead and give her a donkey-punch!