I thought I'd ask, since today is her 46th birthday.
(And the Concert for Diana at Wembley Stadium airs today.)
To me, there's no one thing that stands out to me, because she did so many wonderful things:
She didn't contribute to the stigma that those suffering from HIV were dirty and they must never be touched. She hugged them, she shook their hands.
Because of her there's been more of an awareness of the death and devastation caused by landmines. Now, the United States is starting to rethink their policies regarding landmines.
She demystified the Royals. She was a very hands on mother who wanted her children to live as normal lives as possible. She took them to amusement parks. They waited in line and paid for tickets. She raised her sons to recognize the importance of charity work.