Ok...I gotta be honest. While my previous answer was technically correct, I like most others I suppose, find that my "favorite" Smith and Wesson (or any other brand) is the one I got most recently. That would be this ugly Model 28-2 I rescued from the LGS a week or so ago. It had been hanging around the joint for a couple of months in the "If you have to ask, you can't afford it" case, but the price wasn't really all THAT high, except that it had the ugliest set of K-frame stocks on it I'd ever seen. I told myself I didn't want it, it had a 6" barrel, I like 4". It had those UGLY stocks! But it had about the best trigger I've ever pulled. It wasn't real old, about 1979 or so. But it just sat there, staring at me, like a puppy dumped on the side of the road. I finally broke down and took it home.
As it was on the side of the road.
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I took it home, gave it a bath in Gunscrubber and Hoppe's, then Flitzed it a little, and did final grooming with Ren Wax. I had a nice set of Altamont target stocks that came off my Model 29-10 because they didn't fit that gun just right. However they went right onto the Model 28 like they'd been fitted to it.
I took it to the range over the weekend, and put 100 rounds of my special 357 Wimps through it, blew the 10 X ring out of a B-27 (at a laughingly close range, but I'm an old man and don't see as good as I used to).
I think this one might be my newest "favorite" Smith and Wesson.
After a little dusting and cleaning...
Next week? Who knows?