I may be the minority here. But I wish they make them thinner and lighter.
The phones have gradually gotten heavier the last few years and I don’t like it.
I find them thin enough, although I was surprised by the weight of my dads XR (8 plus owner).
Personally, I wouldn't mind a switch to plastic, but it seemed to be a common complaint back when Samsung did it. Never bothered me though and I always keep my phone in a case.