I used to carry a 19 or my 26. The latter was a tad easier to conceal. However, if we ever get rid of mag bans, I would consider a Gen 5 19. I have no interest in experimenting with Glock clones. The slim line guns didn't appeal to me when renting, with a floppy cover garment - the different was trivial for a 19. A 17 that's different.
Currently, I have 42 on my belt as I'm going in the basement to dry fire in practice for a small carry gun match. No pocket draws at a match. Those fast draw guys would have a ball with pocket carry.