iPhone SE 1st edition was my peak iPhone. Everything else has been downhill.

iPhone SE 2nd edition for me, I prefer soft edges.

Design-wise it's iPhone 4 for me. It still feels great to hold. I wish the Pro models went back to this all-flat design, and let the other models worry about thinness.

I want an all-screen iPod gen 2-4 as a phone.

It was the 4 / 4S for me. Perfect size.

this is basically a modern iPhone 6 plus, so I guess they agree with you

iPhone 3GS was peak.