I have the 12 PM, but just ordered a 13 Pro since the trade in value made it only $250 out of pocket including taxes, which is a great deal for something I definitely get more than $250 of value out of every year.
I started going with the larger iphone model with the 7 + having the dual camera system. Since the 7+, Apple has often given the larger model hardware advantages over the "normal" phone. This drove me to the larger phone until this year. With the 13 Pro having as good of a battery (if not even slightly better) as the 12 PM as well as the same hardware (including camera system), I feel I can finally go for the "normal" phone. I rarely watch media on my phone, and the bulk just isn't worth it as I get older.
I think it's really important to double down on the battery item. I just checked and the 13 Pro vs. X battery life is an improvement of ~ 70% according to Apple, which is significant.