To me, I first have to make a distinction between a major and minor caliber pocket gun. My personal experience:
Minor guns:
1. Taurs PT-22 - very pretty gun - total jammer. It was a horror. Got rid of it. A friend had a Beretta 21 - same story. Thus, you might get a good one but I wouldn't trust it.
2. NAA 22s - haha - bought it because it was cute - very a sub-bug gun. Good if attacked by someone's nose.
3. NAA 22 Mag - a nice BUG, not a primary but a SHTF of the major gun backup. Yes, it's single action and harder to shoot. On the other hand, the 22 Mag round going off, will scare the crap out of the immediate environment.
Majors:
1. What are the 32s? Interesting question. They were used as police guns in semis for a long time. You can get a small one - the Seecamps, Kel-tecs, Guardians, etc. Really just a BUG, IMHO.
2. The 32 HR Mag - I have a nice 432 J frame. Very light and an easy pocket gun. Without getting into a stopping power argument. I wouldn't discount it as the primary pocket gun.
3. The 642 !!! We have a winner in weight and power and shootability. With the new quality +P 38s, that's my primary pocket gun.
4. My PM9 -
. Some folks are recommending these over the Js. The advantage is the 9mm round (you can get the 40 SW versions also). Easier to reload. However, mine has been a dog, jams, jams, etc. I know I can send it back and spend the money on shipping, etc. However, that rankles me. It jams with about 5 different types of ammo. That shouldn't be. I have to think about keeping it. To me a pocket gun must be ultimately reliable. The small semis aren't that fast in a tap, rack, bang drills.
So I go for the J's. Clint Smith said so also and he is god - haha.