This thread has really brought out the revolver partisans, but my experience is different. I carried one of two of the J frames I own until I got one of the stainless S&W .380 PPK pistols.
For me, it was much easier to carry and far more accurate. I added a PPK/s magazine and a grip spacer for one more round, broke all those sharp edges with a fine file, put a tiny piece of 3M tread tape on the front of the grip, and it is perfect for my use and ability.
The reliability of the little PPK, it's safety, and its accuracy overcome any misgivings I had about caliber.
Here in the Sunny Southern Hell we call summer in Virginia, the PPK is perfect. In cooler months (which can't come too soon) I'll have a larger single stack 9, like a Walther PPS. The revolvers stay at home.