Pine's had some great Kirk moments, where he wasn't Shatner but really Kirk was we know him.
In ST09, when Uhura confronts him when she says 'I hope you know what you're doing, 'captain'.' And his reply, from what he said, how he said it, the look in his eyes, the feelings behind them.... completely Kirk. Kirk never believed in the no-win scenario, not because he simply didn't, but because he felt he couldn't afford to. Not when it ment someone could die. That didn't mean he think he was incapable of feeling, he just told himself not to. That small moment of vulnerability we saw at that moment, was something we've seen from Kirk in TOS and the movies aswell. The way Pine delivered that, stunning.
That, and the moment at the end of the movie, when he was been given command of the Enterprise, and they're about to go underway. He steps onto the bridge, looks around, sees Bones.... Perfect Kirk-moment.