At the same time, the shape and materials are far more satisfying aesthetically than the 3G/3GS's more rounded, plastic shell. When I have the phone out, I find myself unconsciously flipping it around in my hand or running my fingers around its smooth, cool surfaces--I want to always be touching it, basically. A well-designed object will do that. I felt the same way with the more contoured aluminum of the original iPhone, but not the 3GS I replaced it with--I never really got into the bulgey plastic back. Then again, over the course of two years, I dented my original iPhone to all hell, dropping it several times with no shattering; I can't imagine the iPhone 4 being as durable, which is the unfortunate downside of Apple designer Jonathan Ive's aesthetic choices here.