So I would say that pretty much all of us, me included, have something that they don't love about their appearance. As a photographer, you are trying to not only take a technically good photo, but also capture people in their best light so that the results show the best of who they really are. This doesn't mean that your photographer needs to know how to make you loose 25 pounds in photoshop or how to erase age lines to make you look 10 years younger. You just need to know something about light and positioning. The best angle I have found for almost every body type is to sit your subject sideways looking at you slightly over their shoulder with you taking the photo at eye level or slightly about. Also when it comes to lighting avoid harsh sunlight or shadows. Stand you subjects in the shade or wait for a partly cloudy day. If you can't avoid the shadows, use your flash outside and in bright sunlight. The flash will help to fill in the shadows that are cast at weird angles so that people are more evenly lit. Here is an example: