I also prefer the decocker. I've heard from a lot of gun instructors that people forget to turn off the safety a lot and it makes sense that, in an adrenaline filled environment, you may forget unless you've trained your muscle memory to do it so often that you don't even think about it. I probably don't train enough to qualify. 
Although generations have sworn by the cocked & locked 1911, to me it just introduces another complication to have to swipe off the safety and possibly screw up your grip while bringing the gun into play during the stress of SHTF situation. To me, it just seems much simpler, safer and faster in the long run to draw your weapon with the hammer down on a chambered round, acquire the target, put your finger on the trigger and squeeze off the first round, even if it is a somewhat longer DA pull on the first round, at least you've got one bullet down the pipe on its way to the target, with follow up shots fired single action. The simple equation is that, no matter what, you have to pull the trigger to make your pistol go bang, swiping off a safety just complicates the process, especially when the SHTF.
Even with a 1911 grip safety, drawing cocked and locked can be fraught with danger if you get discombobulated:
https://www.youtube.com/watch?v=p3kJ6SU3ycsThat's probably why the US Military recommended carrying the 1911 in Condition 3 - hammer down on an empty chamber with a full magazine, unless, I assume, you were actively engaged in combat. Condition 3 is how I carry my Sig 938 (when I have to be extra stealthy while carrying) because I'm not comfortable carrying single action in Condition 1. Just too many opportunities for the safety to get deactivated while I'm squirming around doing my daily routine, getting in and out of vehicles, etc. (and the 938 doesn't even have a grip safety). Of course, it means I'd have to chamber a round before bringing it into play when the SHTF, but that's just an extra measure of safety to keep me from shooting myself or an innocent bystander.
