Been on the 12 Pro silver since launch with no case, still feeling really good about this one. Upgrading from a 6 I was worried about the size in my pocket, but it's pretty marginal in that sense. The biggest difference is the screen size, and I find it difficult touching things at the top of the screen one handed.
Also, picked up this glass screen protector from Spigen:
https://www.amazon.com/gp/product/B08DQT3F3C/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1
Installation is stupid easy and pretty full proof. The glass is really nice. No extra glare or fingerprints than the regular screen would have. Swiping from the edges still feels really good and I don't even notice the lip from the glass. It was actually more of a problem on the previous iPhone designs with the rounded edges. Swiping from a smooth rounded edge over a glass lip it was very noticeable, with the 12 design, my thumb feels the square edge of the phone and hardly even registers that there's a glass lip there.
And I have to say, the stainless steel frame is beautiful. Fingerprints are 100% not noticeable from any reasonable viewing distance.