National Review Online contributor, Rod Dreher, left the Catholic Church for the Orthodox Church. He wrote a lengthy explanation of the change and what drove him to leave the church he had always known.
He investigated the sex-abuse scandal in the church, which put him face to face with lies, cover-ups and conspiracies. This left his faith damaged and depleted.
As I said, it is a very lengthy article, but it is interesting to see someone come out with a more vibrant faith after enduring trials.