I am prepared to shoot and shoot to kill any and all intruders that enter my home. However this doesn't mean that I prowl my house at night with a loaded .357 Magnum in hand.
Fortunately, I have never had misfortune of being robbed. However if I where to catch an intruder in my house (lets assume I caught him red handed by turning lights on) I would attempt first to use the gun as a power chip. Something along the lines of hold him at gunpoint, until the police arrived. This being said, if he had a gun, knife, bat, or any other weapon and if he made any move to use his weapon, I would, without hesitation defend myself. I hope I'll be able to go through life without ever having to shoot anyone, however I'll be ready to do so if the need ever arises.
My kids will be schooled in the proper handling of firearms and I'll make sure they understand the meaning of the phrase "Guns do not kill people, people do."