I dryfire with my carry gun daily, practicing my draw from concealment, getting on target and firing. I haven't yet done so, ever, with my HD shotgun but did a whole lot of snapping in and dryfire with the M16A2 in the USMC.
When I get a new Ruger DA revolver, I dryfire it without aiming a considerable amount to smooth out the trigger. I have been known to read my Kindle while dryfiring a GP100 nonstop for hours.
“Government is not reason, it is not eloquence – it is force. Like fire, it is a dangerous servant and fearful master.”
― George Washington