I've owned and carried KelTecs in .32 and .380, and NAA Guardians in .32.
Yes, .380 ammo is cheaper and easier to find.
Still, I chose the .32 Guardian.
In my opinion only (YMMV), the NAA just gives me more pride of ownership.
Yes, the weight is an issue, but since I got used to carrying my Kahr PM9 in my pocket, the Guardian is not that bad.
It feels more like a gun.
It is more pleasing to the eye.
I have a feeling the steel gun will last longer.
That said, if you want the ultimate drop-in-your-pocket-and-forget-it gun, get a P32, shoot a few hundred rounds, and get it reliable, and you're good to go.
The light weight and ease of shooting of this gun is truly remarkable.
After John Browning designed the .380, he continued to carry a .32.
No, it's not the ultimate fight stopper, but neither is any handgun.
Carry a 9, 40, 45, 38, etc. if at all possible.
Me? I'm packing a Guardian, in .32.