A big part is probably fashion. Thin small, etc. fits better in small purses, weighs less, looks cuter in a female's hand. Though I'm with having a rubber gri

A big part is probably fashion. Thin small, etc. fits better in small purses, weighs less, looks cuter in a female's hand. Though I'm with having a rubber grip case instead of a slick one, probably save a lot of drops.. then again it would snag in ladies clutches and if worn would probably crease clothes...