I think you can classify handguns into;
Target
Hunting
Duty
Carry
and
Novelty.
Target guns are just that, over sized with over sized everything sights, mag wells, mage release, slide release, barrels.... Basiclly IPDA type guns, olympic , or other target shoots in mind when the gun was put together.
The hunting gun are usually large bore longer barrels with adjustable sights. Specials or light loads are used in place of the heavy hunting load.
Duty guns are full sized guns 4 to 5 inch barrels in standard calibers 9mm,38 Super, 357 Sig, 357 mag, 40, and 45 these are you full sized 1911, sig P226, Beretta 92's and the Glock 17 ect.
The cary guns are chopped and bobbed versions ofthe duty guns or special designed for carry with rounded edges.
The officer models, the glock 26, the Detective special and J framed revolvers. Most still in a duty caliber (380, 38 Special and up) Even a 32 ACp in the form of a Walther PP or Colt 1903.
The novelty guns are tiny things that are are tiny, made to be hide out guns. Some are funtional and somewhat easy to shoot some are not,
in 22 LR and up to 380. Micro autos, micro revolvers, derrengers, and anything that looks like it should be on a key chain, belt buckle or for Defensive Barbie is in this catagory.
I think what you carry is going to depend on what you see as a threat, where you are and what clothing you wear.
When I lived in Southern CA and walked the dog in the morning I carried a novelty gun, a small Walther TPH in 22 LR for three reasons. 1 it was loud, 2 my threats were Coyote, and 3 Wearing shorts in the desert heat I needed to Hide the gun. Protection for the dog more then me and the loud noise was more what I wanted than to have dead yotes.
When I lived in Va I carried a Sig P230 as I was on a bike and needed it to be compact and hiden but large enough to grab and use. Protection against being a target of oppertunity while on my way to and from work.
When I had my live threatened I had my P 226 with spare mags on me. I was a target and being hunted. I met two guys with baseball bates in front of my apartment that did not want me to testafy against the Roderick Peoples for stealing my Jeep.
No matter what you want to carry, practice with it. Be able to get the gun out and on target quickly and safely. Having a novelty gun jammed in your front pocket while you are sitting is not gojng to come out smooth or safe. Be able to make multiple hits quickly. Go shoot IDPA with your carry gun. There is nothing better to get you used to drawing and shooting. If you need a gun so much will e going on that drills and mussle memmory will help you.