The Daily Mail (U.K.) has a photo story showing first daughter Malia (age 17) looking sour while biking with the Obama family on Martha's Vineyard. This is strictly dog-bites-man stuff, a non-story.
What teenager wants to spend time with family when there are other teens to hang with? Only a weird one, and apparently she isn't weird. Cut the kid some slack.
At 17 everything your parents do is infinitely embarrassing and uncool. It's only several years later when you recapture the appreciation of their fine qualities you had as a primary school tyke.