I spent the last year with my 6s Plus. Loved it for the most part, but there were lots of situations where it became sort of unwieldily and I wondered what it would be like if I switched back to the 4.7-inch phone.
So this year, I got an iPhone 7. And since getting it yesterday, I do miss the big screen, but honestly I'm getting used to this smaller one again + the portability is so, so nice. I think the usage patterns for me was to try to do literally everything on that screen, including reading books and watching movies and I came to the conclusion that it's still way better on an iPad. So, when I need a portable computer on me, that I don't fuss with in size, I'm more than happy with the 7.
Plus, the battery life gap between the 7 and 7 Plus is the closest it's ever been, so battery isn't too huge of a deal for me anymore. And I got the 256GB model, which I'm very happy to compromise on in trading the bigger size for.
To each their own!