I have switched back and forth so many times between the 4.7" and 5.5". I think I started with a 6 plus, for a short period, until I couldn't stand how it constantly dug into pant pockets. Then sold it and got to a 6, and later 6S.
Just a few months ago, I gave my wife the 6S, and got a 6S+ to use in a trip in Japan. Loved it this time, since 90% of the time, I had the phone in my hand for google maps or Pokémon Go. The bigger screen size and longer battery life were very handy. My shorts also had large pockets so carrying it wasn't a problem at all.
Now life is back to normal in the Fall, and my usage is back to a normal (low) level; that is, I spend more time carrying than using it, in small pants/jeans pockets. Hence, I decided to go back to a 7 at launch. While it is pocket-friendly, I can't help but feeling the 7 isn't perfect anymore, like something is missing, or I somehow want more... The two months living with the plus has ruined it for me.
So I returned it, and now I have a 7+. I'm happy to get the big screen back. I even watched a few episodes on it last couple of days. But then just today, I ate at a bar with my family, sitting on stools with small tables. There was no space to put my phone on the table. It had to stay in my pocket, and was extremely uncomfortable.
Like the ancient Chinese said - there are no needles with two sharp ends.
I hate Apple