I did just that a couple of years ago. I'd given the new 52 a shot twice. I mostly found it to be emotionally hollow, with no heart, camaraderie, or sense of heroism. I thought that they fixed some things that were never broken to begin with. Example: Black Canary's origin didn't need to be....turned in to what it was. And there were some interesting characters/story ideas that were just dropped. Starling from BoP, a fan favorite in the making? Revealed as a traitor. Dropped from the book and into limbo. The Flash's Singh/Piper subplot? Dropped and ignored. DC set up ideas and plots and never used them.
Not gonna talk about the old DCU. Management already screwed that up, too.
So I dropped the books I was reading (about 16 of Wave 1, a couple of Wave 2). The things I've heard about the titles since then have convinced me that I did the right thing. Aside from Rogues' Rebellion and a Flash title, I have avoided the new 52 save for leafing through the odd comic at the LCS.
Between the shabby treatment of creators, the constant last-minute changes, and the weird pre-Crisis-meets-1990s-Image sensibility, I'm uncomfortable supporting DC Comics. I can't get behind a company whose management just doesn't care.
I am not alone. I have several friends who finally threw up their hands and dropped the new 52. They'll pick up Vertigo, Batman 66, but not the new 52.
I wrote a letter to Diane Nelson explaining why I was not buying the new 52. I am considering a letter to Mr. Tsujihara (Warners' new CEO) as well.