*&* Model 19, the Combat Magnum, with 4" barrel and round butt configuration. Mine is a an ex-U.S. State Department issue gun, one of the few that were made with a four-inch barrel and a round butt.
Why is it my favorite? Nothing balances and points like a 4" Model 19, and it has the most graceful lines to boot.
No other handgun has ever had the same combination of balance, power, ergonomics, reliability, etc. It is, in my view, the single most perfect and most useful handgun ever developed.
My favorite right now is my *&* 57. It's a Blued 6" .41 mag. This was the first gun I bought made by that company, and I've been impressed. I used to wonder why everyone else liked them.
It may have some competition when I get my 58 in a couple of weeks though.
My favorite revolver of all time is still the Smith & Wesson
model 28 "Highway Patrolman", in either the 4" or 6"
barrel length's. Nut'in like 'em N-frame Smith's.
My favorite revolvers would be my S&W model 13 with a 4 inch pipe, and my Ruger Security Six with the 2 3/4 inch tube. I have a few more favorites, but it would take up too much room to list them all.
Well, it balances nicely and is almost recoil-free. It's a tackdriver with a sweet N-frame trigger. But mostly, well... a picture is worth a thousand words...