Thanks for the comments!
I'm clearly not an expert on handguns. I'm doing as much research as possible because I am interested in (1) for home protection and (2) for concealed carry (at times). I've narrowed down the concealed carry to the Ruger LCP. But, I want something different to shoot as well, for a different result (for home defense, for example). But, I don't want a handgun that's going to more than a casual shooter, like me, can handle. I will not be putting 1000s of rounds through these guns. I will work them enough to be comfortable and capable, but not where I can be Wyatt Earp (or Doc Holiday). The 380 ACP and 9 MM felt very similar (even through the 9 MM was a slightly bigger gun). I just don't want to fight a bigger caliber gun. I don't want to fall victim to "bigger is better". I want "the right size". So, before I spend time borrowing, renting, etc. a 45 caliber, I want to know some thoughts from those that have shot one.