Even though I have assault rifles and shotguns, my primary HDG is always one of the semi-auto pistols. Whenever I did hear a bump & wanted to check things out, the XD-45 and me went for a walk. My wife stays in the bedroom with her Beretta 92 and cell phone.
My thinking has always been that a long arm inside the house is too easy to be grabbed around corners, takes two hands to manage well, meaning that you have no extra hand for light switches, door knobs, etc. This coming from a guy who has paced out the inside of his home and can get around with a blindfold on, including the stairs.
My S.O.P. is handguns inside, long arms outside. But to each his own! At least we all got guns, lots of ammo and more guns!