An amazing interview. It really sheds light on Martin's ideals on "morals" and how things are rarely as simple as "black and white."
I always thought Jaime's character arc is (so far) the best character development I've ever read, and the Rolling Stone interview helps point it out. We meet him as the Kingslayer, the man willing to kill a child to hide his own shame... but he is not just a corrupt, incestuous asshole. That first big scene with Bran falling from the window wasn't just Jaime protecting his own ass; there is a deeper level that I barely considered in that he's also protecting his sister/lover, and their children as well.
Martin points out that people are quick to say they would never do that, but then he asks them to see it from Jaime's perspective: Would they kill an innocent child to protect their whole family? No matter how morally straight-edge you think you are, you're going to hesitate and at least think about that proposition for a second.
And that's why Jaime's story is so enthralling to me. On the surface, it appears that Jaime starts off as a "bad guy" and is trying to transition to "good guy," following that "redemption" arc that Martin talks about in the interview... but the reality is that he's always in a grey area, and the extremes on the "good" and "bad" scale are both highlighted at various times and in situations that are impossible to predict.
It's a microcosm of the whole series, where there are very few true examples of things that are strictly "good" and "evil." It's not just about transitioning and seeking redemption (unless you're Sandor Clegane). It's more a question of "can we be redeemed?"
Nerdgasm.