Most of us make this decision by what we keep by the bedside every night. I keep a H&K USP in 40 S&W. Shotguns, (which I've used on varmints outside at night many times) are too slow and unwieldly in a house. I want to be nimble and quick.

And if I hear one more time "Just rack the slide on a 12 gauge and the invader will run" ------- I'll regurgitate.