It is somewhat cursed to desire a new design iPhone on macrumors. Majority of people on here will not understand because function is absolutely everything to them. I always upgraded on physical design change (4,5,6) and never bought a 'S' cycle and probably never will. I was disappointed at the 7 because it looked like a 6 so I skipped it. I have been using my 6 for about 3 years now. Some person commented on one of my post asking "If design refresh is that important to you, then do you buy a new microwave every year? Do you buy a new car every year?"
I'm all for better battery and feature packed devices, but I want my phone to look good (subjective) and thin as possible. I'm one of those rare group of people that supports phones getting thinner as long as the battery life remains same or marginally better, I could not care less, make them thinner. I'm all for all glass design with little buttons as possible. I am ok with headphone jack being removed because my phone looks and feels better in my opinion. I am in a similar situation where I will skip again this year if iPhone 8 (or whatever its called) looked similar to the current 6 series (this includes the 7 too).
What I felt using iPhones post the 5 series, the functions and operating the OS in the phone were more or less consistent with later models. I never felt it needed more power, more ram, more graphics, more battery etc etc at the time of using them. It was good enough for what I did and how I used it.
Yea, so I am a form kinda guy as long as the performance of the phone remains the same/marginally better.
Give me a new design over new processors/ram/thicker phone any day.