I may, or may not, carry a pistol, but there is always a revolver in the nightstand on both sides of the bed.
There are several reasons, the first is if someone makes it to my bedroom undiscovered I want the simplicity and reliability of a revolver. A pistol could be pressed out of battery if I had to push the muzzle against an adversary who is already danger close. Yeah i know, no way anyone gets that close to one of us experts, but it happens all the time.
Second my wife is a dedicated revolver shooter. If she has to, for whatever reason, use the weapon on my side it need to be one she uses well. Both are revolvers, a Sw 637 and my Sw Model 60 both use same speed loaders. Biggest difference is Hers has a laser grip and a weapon light on board. I prefer a separate flashlight.
KISS simple...
I carry a pistol more in warm months than I do in colder months. Colder months and for any woods walking I carry revolvers. But no matter what the bedside stays the same.