Not meaning to drag us too far off topic but how do you keep such a large device on you? I'd love to continue keeping my iPhone "on" me because I use it constantly, especially to snap photos I'd miss if I kept the device in a purse or bag all the time. You've bring a very interesting perspective to this forum since you're already used to a large phone.
When Im going from place to place, I always keep it in my shirt top pocket. It sticks out a bit, but it doesnt bother me (Im a guy, soooooo....). Definitely not for everybody, but I just found what works for me. I always have my phone, but the screen size is my most important thing.
When I drive, I have a holder in my car, that allows me to place my phone there, see the screen, and access it with bluetooth, etc. The screen is VERY large from a driving perspective. And the screen is large enough to access it.
Ill find it hard to ever go to a smaller phone. I had a HTC one (4.7" screen) and dont think Id get the 4.7" iPhone if thats all that Apple was offering this time. This is DEFINITELY a personal opinion and youll never know until you see the benefits of the larger screen and weigh it against the values of phone portability/access, and comfort.