It's been a couple years since I shot my friend's AR-15, but at the time it was way more gun than I had any interest in.
The PC Carbine came about by way of a 10/22. The 10/22 was just so ridiculously not a big deal and kind of appealing in an old-school sense. So I was intrigued by the PC Carbine being essentially the 9mm version of it.
Considering my main use case is home defense, but I'd already ruled out a shotgun or handguns (I just don't feel confident when shooting either), the PC Carbine felt like a reasonable start. Really happy with it so far.