Say what you will about her politics, and there's plenty of disagreement on those on our side, but I met Hillary Clinton (very) briefly about half a year ago and she was quite warm and enchanting.
The cynic in me thought, "well, maybe she's an incredibly gifted politician, and it's all an effective act". But I've talked to lots people who know her (and not always agree with her), and when I relate the story, they uniformly report that yes, it's all genuine.
Why am I bringing it up? Because of this, this, and this.