While iOS offers a plentiful mix of excellent and exclusive features, what you see is what you get. Apple doesn't leave much room for customizability, meaning most people's iPhones look relatively the same. You can make yours stand out, however, by giving your apps unique and personal icons.
While you can indeed litter your home screen with as many app icons as you see fit, you can't change an app's icon itself unless the developer has included that as a feature. Instead, you can create what are called "bookmarks," similar to web shortcuts, whose icon can sport any image you like. These... more