Spiffytexan.
Everyone has a different tolerance for what they feel they can and cannot carry concealed, and I think a lot of that depends on what you have had to get used to, not to mention what your threat level really is. In my experience, knowing that there is a good chance that you might really have to use the pistol by virtue of your employment makes you much more tolerant of a larger gun.
I've been carrying a gun, usually concealed, pretty much every day since 1979, in jobs that would have called for me to intervene in either a law enforcement capacity, or use the pistol as a private security contractor overseas. In those situations, you want the best sights you can get, a full grip, and if possible, high magazine capacity in a pistol of at least 9mm. I personally am amazed at all the good options we have for that today. We'd have killed to have a good, reliable gun the size and weight of a Glock 19 back in the day, when all we really had that was reliable was a full-sized K-Frame revolver, an all-steel 1911 running ball ammo, a Browning Hi-Power, or in deference to this forum, a full-sized CZ-75.
My new PCR actually seems tiny to me, compared to what I am used to. I plan to carry it, just as I did my 19, in a good, rigid, professional grade IWB holster with a sweat guard, and just not wear skin-tight clothing. It's all in what you are used to, but a good holster, and a double thickness belt will help a lot.
On the other hand, most civilians who do not go in harm's way on purpose are probably fine with one of the newer single stack "pocket 9's" like my little Kahr pistol, or even a .380 for most things. But for me, 35 years of habit dies hard, even though I am not essentially retired. I just know that in all the situations I ever found myself in, I never once found myself wishing for a smaller gun, or less ammo. But I do realize that not everyone is going to be in that situation often.
Best wishes on whatever you choose to carry. Keep in mind that almost nobody you really have to worry about pays attention to whether you are carrying or not. Most never even notice a thing. How we "make you" as somebody carrying a gun is all the "fidgeting" that people do who are not used to daily carry. Stay safe!