I have a collection of pistols and revolvers just because I can. Scoped 454 Casull for hunting, S&W 15-2 because I carried one in the Air Force and J frames as back-ups. However, semi-autos have higher round counts and easy change magazines for SHTF situations. Start with what you're comfortable with and can afford to own AND shoot (ammo ain't always cheap). One day, you too will have a collection of handguns and a closet full of holsters (the ones that just didn't work out).