When I first started looking, it was going to be one and done, but after a bit of shopping I understand why people end up with so many. Originally I was only interested in Conceal Carry, so not any of the larger guns. I did a course at a range which was very beneficial. It was a retired cop, so he had tons of example scenarios for the audience.
I live in the city so I was originally looking at something to bring with me for around town and in the car. My friend really likes his .380 for this, plus his wife can use it. My wife will be shooting with me, and she's a tiny thing. But of course the guns nuts rant about "no stopping power" with .380. the Sig P365 9mm is damn near the same size, so i agree it will take some trips to the range to see what I like.