At last an explanation for a certain celebutante’s robotic pose in thousands of photos (NOT pictured here). It turns out that there really is a preferred angle for successful photos.
TheBodyOdd.com gives us this: To Look Better in Photos, Tilt Your Head, Study Suggests. Naturally, their article is accompanied by this photo of the beautiful Angelina Jolie who does the tilt almost imperceptibly. A great example of how it should be done.