Summarize this article:

One of the characteristics of photogenic people is their confidence in their appearance. Many times we get concerned about something wrong with our face; our freckles, the gap in your teeth, how squinty your eyes get when you smile. Instead of trying to hide those things, embrace them! You will look much more photogenic in your photos that way. It is easy to spot someone who is photogenic from someone who is posing; the former doesn't have to fake their emotions. Although getting your photo taken can be nerve-wrecking, don't let it get in the way of your true feelings. Don't create the smile you think you need, use your regular smile. The same goes with the shape of your eyes and the curve of your cheeks. The more you allow your natural emotions to show on your face, the better your pictures will look. Always smile with your teeth, because you would never laugh at a funny joke with your lips together. True smiles show off a toothy grin, not tightly pressed lips. Keep your face natural by allowing a real smile to peak through. When you are showing emotions your entire face is affected. Although many people associate a look of happiness with just a smile, your eyebrows, eyes, cheeks, and forehead are all affected equally as much. Make sure that you are allowing freedom of movement in your entire face. As the old saying goes, "the camera adds ten pounds." But it doesn't have to! Because the camera is using reflected light to convert a 3D object into a 2D image, the shapes of things are flattened and compressed. Looking straight ahead at the camera will show the fullness of your face and remove/reduce any natural shadows. Instead, turn your face slightly to the side to create natural highlights and shadows and slim the shape of your face. The angle of your face is tied to the direction you are looking at the camera. Just as how you shouldn't look at the camera straight on, you also should not tilt your head up when taking photos. This will make your face look larger and get a good shot up the inside of your nose. Tilt your head slightly down and to the side for the most photogenic of looks.

Summary:
Focus on what makes you unique. Show your emotions. Don't look the camera straight on. Adjust the angle of your face.