The month I had my 12 Pro - I noticed I could put the phone in my back pocket and forget it was there.Yeah exactly. I had an 8+ and went for a smaller device last upgrade and realised I preferred a more pocketable phone. Everybody is different, I didn’t overthink it, picked a device to use for a couple of years and haven’t looked back.
My 12 PM and 13 PM actually pulls my pants down and is uncomfortable so I usually leave it home. But in the end, I preferred a bigger screen and robust battery for my needs - especially since I work at home now and sit all day. LOL. If I was more mobile I'd probably lean more towards a more pocketable phone.