Can't really add anything substantive to the discussion, but I'll answer anyway since the question was posed. I will also qualify this by saying I've never been in a situation where I truly thought someone was about to kill me or a loved one (in a fight? Sure) and I've never pointed a weapon at someone.
I will not draw my weapon unless I am immediate fear of my life and think shooting is the best/only solution. That means, the gun is not coming out unless I have every intention of firing. I might take grip and short-circuit the first part of the drawstroke if something is developing about which I'm unsure or have the gun in a low-ready if I heard glass crashing at 2am and the dog barking. But if I'm pointing the weapon at someone, my *plan* (and we all know what they are worth) is that I've made a shoot/no shoot decision, I'm prepping the trigger as the gun comes to extension and I'm not going to be trying to decide if I should short circuit that decision. My decision is made and I will live and die with the consequences of that choice. Could something happen where I suddenly go 'Oh, shit! I fucked up. Dontshootdontshootdontshoot." Hopefully I have the ability to stop it at that point, but that is not my *plan*. Hopefully my plan never is tested. I have no illusions about being any kind of tough guy.