I just pulled out my 4s out of the case it's been sitting in for the last three years or so that I could use it exclusively as a wifi remote for my projection system while teaching. I'm telling you, I just fell in love with the design of that phone all over again. The glass front and back... The brushed stainless look of the frame... The round volume buttons... The sheer symmetrical beauty of the shape matched with the contrast of the front/back with the frame... Of all the iPhones I've owned, I think clearly this is my favorite look/feel. So which design is your favorite over the years?