Don't get me wrong I liked my iPhone too, but functionality comes first, then I can worry about size. It was limited with what I needed.
Before I smartphone'd up I didn't either, the iPhone made the exception with its easy user interface and doing a good amount of things I needed done easily. As I grew with time my phone didn't. So in the beginning it was fantastic, now I pick it up after using a an android and the small screen is first obstacle.