M. Yu's favorite photo

This one is by far my favorite. You'll notice that practically everyone in the picture wears an especially stern facial expression, the key exception being, of course, Mr. and Mrs. Obama. Whereas all the other subjects seem to be taking this very seriously (and rightfully so, actually), the Obamas are reveling in the moment, savoring the joy of what is by far the most glorious occasion in their lives. There's a sense of unmitigated joy in their demeanor, definitely not an emotion anyone could easily fake. Even if you were the most ardent opponent of Obama's, you can't really help but feel happy for him and his family at this particular moment because he and his wife are so happy. There is a small flaw in the sense that the two men to the left of the couple are also in focus, which takes away from the attention that should be centered on Barack and Michelle, but perhaps the two men were too close to the subjects of interest for them to be blurred out.