Roger Ebert gives us nine reasons “Why I Hate 3-D (And You Should, Too)” in Newsweek magazine. Here's a 10th reason from me. Maybe it's encompassed in one of the others, such as “It Adds Nothing to the Experience” or “Have You Noticed That 3-D Seems a Little Dim?,” but it seems important enough to stand alone:

It makes the movies seem SMALL.

I noticed this while watching “Up” in 3-D last year. By creating volume for the 3-D image, it seems to shrink it. The characters don't seem as big, the canvas doesn't seem as wide. It's no longer bigger than life. Maybe you need 2-D to seem bigger than life. Maybe that's what bigger than life means: two dimensions. I preferred “Up” in 2-D, when the colors, per Roger, seemed glorious, and when my imagination, per Roger, provided that third dimension.

Roger's is a good starting point to a counter-argument that no one in Hollywood will listen to. Because they have 2.7 billion reasons not to. Because they think “Avatar”'s success was built solely on 3-D, which is something they can control, rather than expert storytelling and attention to detail, which they can't.