eh... I have 3 go to guns in my house...
I keep a fully loaded Beretta 92fs with 124gr +p hp, ak47(whatever i got 6 different types of ammo), and Mossberg 500a I think its loaded with 00 buck fiocchi.
I'm going to grab one of these three.. On multiple occasions I've heard a bump in the night or just a bad feeling.. I've found myself carrying a different gun each time.. Its really whatever is closer or whatever is my newest loaded up toy at the time.