I shot Smith & Wesson revolvers for a couple of years--shot them lots--before I bowed to pressure from my son to get into cowboy action and got a couple of Ruger SA's. And here's the thing; a SA revolver points like the danged finger of god. It points like nothing else, and it's got a light, easy trigger pull, and I can hit with that thing (my favorite being a Bisley Blackhawk in .41 mag) like no other handgun I've ever shot. Not as fast, and not for as many shots, but just sure and easy hits. It is especially well suited to one handed shooting--you really get the sense that a handgun came about as a cavalry weapon; the off hand is clearly meant to be holding reins.
Particularly for a bigbore handgun, a SA also handles recoil MUCH better than a DA. Something about the shape just rolls it up in your hand; and add to that that the Ruger SA's are well known to be rugged specimens for their calibers, so you can shoot plenty of big thumping loads, if that's your deal, with no concern for your gun OR your wrist. So, I guess the attraction is fun, accurate shooting. Cowboy action is fun, but I've come to like the Rugers for more than SASS.