I have owned almost all of the kel tec pistols at one point or another and each have their drawbacks and advantages.
P11- incredibly small package for 12 rounds of 9mm, LONG trigger pull, even when compared to a DA revolver, the trigger is 8.5lbs. from the factory, but the length makes it feel heavier to me, fits my hand perfectly
PF9 - the only KT pistol I have not owned, held one and was really impressed with the size and trigger improvement over the P11, this is an ideal compromise IMO
P32/P3AT - basically the same gun, with the .32 version you are limited to FMJ only unless you use modified magazines
I still carry a SW 642 90% of the time. The cylinder is bulkier than a semi-auto, but the frame and barrel are as thin as the .32. A good pocket holster will break up the outline and make it carry much better.
Spare ammo is easily carried in a Speedstrip. They aren't much faster than loading single rounds, but it keeps the ammo all together.
The biggest advantage to the revolver in my opinion is that it will work upside down, stuck up someone's nose, shooting out of a pocket, etc. A semi-auto is more likely to malfunction when shot from a less conventional position. If someone grabs a revolver's cylinder, theoretically they could prevent the cylinder from turning and thus tying up the gun, but it takes very strong hands to do this and I plan to be kicking and otherwise distracting my attacker as much as possible if they're that close.
W