My preferred action type in a shotgun is a gas operated semi auto. The main reason is reduced recoil when shooting heavier loads and/or several boxes of shells at a time. My first was a 12ga Remington 1100 (2.75” chamber) in the early ‘70s. I bought a Remington Lightweight 1100 20ga for dove and quail hunting in the early ‘80s. When the use of steel shot for waterfowl became mandatory, I wanted a 3” chamber and found a used 12ga Remington 11-87. Great shotgun, but heavy (8.2lbs) for carrying hunting pheasants all day. But, I used it for many years, until two years ago I bought a 12ga Remington V3 (7.2lbs) and use that for pheasants. Of course, these are all lower end guns. But, I’ve shot my father in law’s fairly new higher end inertia actioned Benelli Super Black Eagle a number of times and frankly, I don’t care for the action? It’s not as smooth as my gas operated and has a kind of “klunk, klunk” feel when the bolt cycles? I’ve shot pump actioned and several O/U shotguns. I really like the O/U style, but when I think back on how many birds (especially doves) I would have lost by not having that third shot, I’ve stayed with my semi autos. I’ve seen many beautiful doubles and O/Us in photos here on AH, and was curious as to what shotgun actions are preferred? Maybe it depends on the bird species hunted?