For me, a bigger screen isn't a plus - after years of following the trend and being on my phone more and more, I managed to kick the habit and I'm very happy that my phone has now found its rightful place as a utility when I'm off my computer, rather than as a primary computer. I use it for maps, e-tickets, answering the occasional im. But it's not as convenient as my computer, it's not for leisurely browsing or media consumption, and I don't want it to be - it means that when I'm off my computer, I'm really off.
So this push toward bigger screens runs counter to what I want a phone to be for me. A bigger screen invites you to grab it with both hands. A bigger screen invites you to watch more stuff on it, watch movies, browse reddit and whatnot. I don't want any of that, I'd in fact prefer if it wasn't good at that, just like I don't want more sugar in my food.