@ben_h: I used to think the same as you, regarding screen size, but then I actually used a ~5inch screen and man, you really just don't notice it's so big. It's thin as fuck so you don't actually feel it in your pocket (this might be less so if you put it in a case), and the screen is absolutely beautiful to look at. I used to be fairly against phone's with screens larger than like 3.5, but man, I was a fool.
I went from a 4.7" screen Samsung phone to an iPhone. I don't miss it.