Obsession with fashion and looks, but quite entertaining!
Barbie: Life in the Dreamhouse is a mock reality show set in a fictional Malibu. The main characters are, of course, Barbie, her boyfriend Ken, Barbie's multitude of friends, and siblings Raquelle and Ryan, who act as the antagonists. Raquelle is always up to some scheme to gain popularity or steal Ken for herself, while Ryan is out to attract Barbie. The antagonists always get their just desserts (usually demonstrated through physical comedy).
The episodes don't outright teach morals, but good messages can be found. Don't be petty, be yourself, get along with others, things like that. Two episodes in particular revolve around Barbie's friend Grace (an African-American woman) and her love for science, which I could see being a great lesson for young girls to learn.
Unfortunately, the good aspects are often overshadowed by a strange obsession with fashion, fame, and beauty. All the girls are pencil-thin, with Raquelle being the only one who is ever shown as less-than-perfect lookswise. Characters are frequently shown shopping, having fashion shows, and talking about clothes.
The show pokes fun at itself quite often, and is genuinely enjoyable for adults to watch alongside their kids as long as they're willing to overlook the vapidness of its material.