I think you should have listed "SXS's" and " O/U's" separately ...
I'm not into shotguns for defense ( that's why I have 1911's ) ...so all of my primary shotguns are O/U's in 12, 20, 28ga's and .410's ....but that's because I shoot Skeet, Trap, Sporting Clays and do a little bird hunting.
I have a few pump guns / but they're all 28" barrels ...and predominately for bird hunting or some clays ...and all relegated to some training for new shooters these days.
I only have a few semi-autos / and they for general clays and hunting as well.. ( and I like a 30" barrel in a semi-auto).
but there is no right or wrong answer .....it depends on what you want the gun for ....