I have a soft spot in my heart for the 32 ACP. Maybe it's 'cause my Grandpa left me an old 1908 Pocket Hammerless that looks like it was never fired. Regardless, I've carried a .32 a lot of days. And it seems to me that one of the major gun rags just ran an article saying .32 was enough.
Shot placement, shot placement, shot placement. I'd rather hit with my .32 than miss with .45
Now, having said that, my last trip to the range with my KelTec P-32 was so trouble prone, and I experienced so much rimlock, that I was really shaken up and refused to carry it as a defensive pistol anymore. I sold it and found myself a good Kimber for a decent price. But a 1911 ain't exactly a pocket gun...
I would gladly carry a .32 again if it were a Colt 1908 (not Grandpa's- that one's retired for sentiment), as it is nice and slim but still small pistol sized and provide a decent hand-hold. I would also gladly carry a Seecamp.
And from everything I've read, the only reason to go .380 over .32 is reliability of function. Again, match your ammo to your gun, and .32 is still a viable option, with more recorded instances of stopping bad guys than .380.
jmho...