...What should be the deciding factor?
That is up to you. A few of mine:
I really, really like the bead blasted stainless finish on my Kimber. It's held up well with only a few shiny spots that are fairly user fixable.
20,000 rounds and still ticking without much issue. I got nothing against other brands, but why would I change when completely happy with a heavily tested gun? Unless, of course, I could afford to go thousands more for a big name gun, (with that same stainless finish.)
No issues with those scary mim parts or internal safety.
American made is a plus for me!