I keep mine in my pocket, I never saw a reason to go back to the 4.7" Android phones that I used for 5 years prior to moving to iOS. 4" is the right size for a phone IMO. I only have notifications enabled for calls and texts, I'm not the type to be into my phone like a fool and look at it while driving, and I only use it for useful purposes. Random Teamviewer access, checking Google News, Feedly, check personal/work email, check deposits/banking. I also have smaller hands, and need to hold onto metal rails as I ride the train and bus. I almost fumble 4.7"+ phones when using them 1-handed.
She usually has her purse and uses her phone more than me, essentially as a tablet. Playing games often such as something I've become accustomed to, Cookie Run. It's really preference. She doesn't mind the larger phone and doesn't mind the inconvenient size for day to day use.
I'm very letdown the 7(Plus) doesn't have a Lightning port pass-through port on the new charging cables. I can let go of 3.5mm, as I don't have any particularly great investment in headphones, but I can't accept inability to charge and use a wired headset at the same time.
I think they will bring in Lightning port pass-through cables with the iPhone7S, but right now want to rake in expensive, more quickly obsolescent (batteries) wireless Beats headphones before they do that.
Wireless stuff to me just means 1 more thing that needs charging, and while I do like those LG around-the-neck Bluetooth headsets, I dislike being forced into it if I want to charge my phone and use a headset.