I have two revolvers; one for hunting big game (a Ruger Blackhawk in .44 mag) and one for a back-up gun as a LEO (a Taurus 6 shot .357 mag with a bobbed hammer). My only problem is that the safe action trigger isn't a safety and I like having the additional comfort of having "one more safety." The revolvers are a different case because hammer forward it takes a lot more PSI to get them to fire than a striker fired weapon. I carry the M&P9 as my duty weapon and I do like it, it is a combat gun but I have taken to leaving it in my locker at work (mag out, it has a S&W mag safety) when I go home at night. The revolver stays with it and I have another gun that always stays with me, my TSW 9 (another Smith 9mm). I would just like to be able to hold onto the M&P as a carry piece because it is lighter than the TSW but with kids in the house, and because I always travel with a gun, it is not practical to have it with me; might have to find a small .38 somewhere for this reason.
I used to have a .45 1911 (Springfield) as a UC gun when I worked narcs and the safety was a great thing. One of the best things about the 1911s are the grip safeties on top of the external, manual safeties; never should have sold that thing.
The Sheriff's Office of the County that surrounds my city are issued Glock hand guns; good for them. But in my time as a firearms instructor and working with them there have been enough (less than 1% I believe) triggers getting caught resulting in an AD that I still do not believe that a "safe action trigger" is actually all that safe, if something manages to get hung up in that trigger well it can engage both triggers.
