For CCW, I'm a hammerless j-frame believer, i.e. 442, 642, 340, etc. It's not the smallest concealable handgun, but they can be had in very lightweight (but pricey) metals, give you 5 shots of a viable defense round, and IMHO don't 'print' so obviously. A concealed j-frame also has a few more advantages which are specific to revolvers ...
versatility of ammo. Whether you're old and feeble of full-house-magnum-ready, there's a load in either .38spl orr .357mag for you
equally reliable with frangible, hollowpoints, SWC, & etc. as it is with FMJ
can be shot repeatedly while shoved up against something (ribs). An auto could fail to return to battery.
can be shot repeatedly from inside a coat pocket, so long as its loose enough in there that the cylinder doesn't bind on cloth. No auto could do that reliably.
drops no brass (unless you reload). Autos poop evidence everywhere. Of course nobody here on THR would be concerned about that
, but its still true.
I wouldn't restrict myself to the 5-shot j-frame for other purposes, but I think it strikes a balance for CCW. I'll take its firepower over a P3AT anyday, I'll take its reliability over the Kahr anyday, and I'll take its lightweight and 'form factor' over double-stack 'subcompact' autos anyday.