Jeffrey Rosen has this interview with the Chief in this month's Atlantic Monthly. (Hat tip How Appealing). Here is a taste:
Despite his concern about separate opinions, Roberts was proud of his relative success in encouraging unanimity, especially in less visible cases. He seemed especially frustrated, therefore, by the media's focus on the number of high-profile 5–4 decisions and the shifting coalitions that had determined them. "There was a question from one of these [tour] groups that come in here: 'How do you decide who's going to be the swing vote?'" Roberts laughed and shook his head. "I don't know, we rotate. That has to undermine--that's a steady wasting away of the notion of the rule of law, a personalization of it."