It varies. For 100% reliability and a perfect fit, usually AMT's 380 Backup DAO , [not the SA model] within a Trickster back-pocket holster.
I had the PM9 for a while, but switched to this DAO with second-strike capability.
The PPK/S in a used, carefully-made OWB, when contracting, hiking, shopping at big-box home centers, is another great choice. A craftsman really loved the original recipient of this PP leather.
I did luck into a sweet Wilson Combat "Rapid Response" holster, OWB, that hugs the hip perfectly. Other than testing to assure satisfaction, I have not carried the 5" 1911. I am, however, ready if the need becomes glaringly apparent. Rioting is one major grid failure away.
Furthermore [and in closing], I include my .22LR 317LS in the listings. With sweet grips and smooth back-pocket draw, it provides a fair amount of assurance, in it's deterrence against an opportunist or two. An accurate, smooth shooter, I'd have no problem trusting my wife to properly use this 2.25" revolver.
This S&W is selected when taking my wife to a show of her choosing, usually in better parts of the City. These selected performances attract hordes of trusting liberals, the ones who believe crime doesn't affect them. An amusement of these flocking sheeple is my entertainment and, for it's duration, my sole compensation, for attending these alternative music venues. Several hours are then spent combatting nausea, as the performer is usually dripping with enough self love and sensitivity to make one vomit.
I guess you can tell that the holster is pretty important in my decisions.