Well, I for one hate large phones. I consider my smartphone as a tool for trivial things, using it almost exclusively with one hand, and it starts hurting after a while. Especially when reaching to the top section of the screen. Buying a smaller phone would usually mean to go with the lower end specs or older generation, which kind of bugs me. I don't play games with it or something, but it must be fast and responsive at all times and have a good camera, too. That's really hard to find these days though. I'm still using a Samsung S7 currently which kind of balances these requirements, but I'm afraid I'll have to move on to one of those giant slabs once it breaks...
It's hard to explain. I'm quite possibly the last of my circle to stick with the smaller smart phones, but it seems so comfortable to me being able to easily pull it out of my pocket, type something with one hand and put it back, all while being able to do what I was doing in parallel.