Miss 88, et al:
DAO has TWO faces. Beretta builds a DAO M-92, whick cocks and drops the hammer, full force, every time the trigger is pulled, just like a S&W revolver; Glock, also considered DAO, by most, and Kahr, do not! Both Kahr, and Glock, require slide cycling to 'half cock' the striker, the trigger doing the rest. Consistant pull, when the gun runs, but "no joy" (read this, immediate action drill:"Tap-Rack-Bang") if it does not!
The Beretta, and the S&W 39/59 crowd, will at least, give a full force swat, to the same (dud?) round, if the trigger is pulled again! Same applies to Walther, in the PP, and P, series pistols.
S&W Revolver, action is the same; ie, pull the trigger again, except you get a new round in the breech, every pull of the trigger!
Draw your own conclusions, based on application, ability, budget, and energy requirements.
My personal choices are (1) a compact, 1911 pattern, SA auto, in .45 ACP, with proven (5,000+ rds)reliability, followed by(#2) a S&W 337PD, in .38 Spl, when #1 just won't fit in!