For me it all depends on where I am going and the likely situation/s I might encounter.
* If in the woods, it is my .41 magnum with a couple speed loaders.
* If in normal non-woods situations it is my 5-shot 357 snubby backed up by my 16-round compact 380.
* If the world
really turns to ... the brown smelly stuff ... I will need a proven battle gun, and that would be my full-size 45ACP 1911 and four spare magazines, and probably backed up by that same compact 380 ... and my tactical 12 gauge pump and a couple bandoleers of 00 buck / slugs.
It did not take me several purchases to "settle" on any of them. I do my homework before I buy.
Is this a handgun? If firing it with one hand, YES.