I am one of those that believes there is nottn wrong with having a gun in the house for protection incase something was gonna go down.

I've settled in getting a Glock, but not sure what type of ammo to choose since the Compact/Subcompact models come in:
(9mm / .40SW / .357Sig /. 380ACP / 10mm / .45ACP)

What is the most common and practical ammo type to go with?