In this photo, taken moments before Obama took the oath to become the 44th president of the United States in 2009.
A restaurant owner Scott Van Duzer giving Obama a bear hug in Florida. While not technically brilliant or beautiful, the photo shows a genuine moment of exuberance, and the look of shock on the face of the man on the far right is fantastic.
照片中一家佛罗里达餐馆老板Scott Van Duzer给了奥巴马一个熊抱。其实这张照片也说不上有多出众或好看，但是它传递了一种真挚的感情，另外最右边男子的表情亮了哈哈。
Obama fist-bumps custodian Lawrence Lipscomb in the White House. Captured by official photographer Pete Souza, this was a moment of courtesy and camaraderie - informal and unscripted, trademarks of his presidency.
奥巴马与白宫管理人员Lawrence Lipscomb顶拳，由白宫摄影师Pete Souza抓拍，这一随意不加修饰的瞬间，象征着尊重和关爱，这也是奥巴马作为总统的一个特征。
Obama plainly loves children, and some of his best moments are those he shares with them – as in this informal shot of him playing with Ella Rhodes, the daughter of his deputy national security adviser, in the Oval Office.
Obama talks with his daughter Malia on the swing set outside the Oval Office. Obama has always found time for his family despite the demands on his time, and this is a real 'dad moment' , symbolising the importance of their relationship.
Obama surreptitiously tips the scales as White House trip director Marvin Nicholson weighs himself on a tour of a locker room at the University of Texas: a president with a genuine sense of humour.
A beautifully composed, graphic shot of Obama walking to Air Force One in Los Angeles, with that old-school cool of the Secret Service.
The suit, the sunglasses, the nonchalant swagger – what's not to like? Unlike most politicians, Obama is genuinely cool.
After meeting with Olympic gymnast McKayla Maroney, Obama mimics her 'not impressed' look. His jokey nature and willingness to make a fool of himself has been a large part of his appeal.
Obama speaking in the rain at a campaign rally in Glen Allen, Virginia – no raincoat, no umbrella and as wet as the crowd that was waiting to hear him speak.
One of the most appealing things about pictures of Obama is the genuine delight that he takes in the events he attends. I love the way that he totally cracks up at a baby dressed as the pope at the annual Halloween party at the White House.
This great shot behind the scenes on inauguration day in 2009 is characteristic of the intimacy between Obama and Michelle, and their relationship is key in many ways to the sustained levels of public and media interest throughout the presidency.
The first family, playing in the snow like any other family.
As president, Obama was constantly surprising – yes, he really did dance the tango on a visit to Argentina.
The fascination with the Obamas was global, and this picture of them hugging after a campaign event in Iowa became the most retweeted picture in history.