2 of 6Image
One of the primary reasons why people jailbreak their iPhone is to be able to customize the look and feel of iOS with themes and icons. This might seem lie putting form ahead of function, but customizing the platform is actually a good way of personalizing the platform, and making it easier to sue.
One of the best tools for doing this is WinterBoard. Once installed, it allows you to customize the look and feel of your iPhone by downloading and installing themes.