I need some input. My Aqwoah icons are borderless, but some people like the rounded rectangles and I like them too. It makes the icons look more organized. So I decided to use the Aqwoah icons, but add some borders and colors.
So on the left, we have some glossy buttons that are colored. I would envisage that the button colors are matched to the type of application. So black might be all the original apple apps. Then some categories like system utilities, chat/communication, games, productivity utils, etc.
On the right iPhone, I made a mix of different framed buttons. They have not been optimized and color matching isn't really good, but it should give you an idea. So what kind of theme(s) would you like to see?