I'm starting to think the ideal gun for me would be a gun like the M&P .40 with the thumb safety. I'm used to years and years of "offing" the safety as I draw and then activating it before I reholster. A lot of accidental discharges happen when reholstering, and during a stressful situation you are going to be looking at the events around you and not down at your holster. With the safety on, you don't have to worry about part of your jacket or shirt getting in the trigger guard, or a limb from a bush, etc. while you are inserting the gun in the holster. I have heard of cases of officers handcuffing a suspect in a scuffle after a shooting, and in all the comotion, when they reholstered their weapon they forgot to decock it. I have also heard of cases when people forget to apply the safety of their 1911 when they reholster, but if that happened with an M&P it would still be as safe as Glock, Springfield XD, or non safety M&P.