Favorite for what? Perfect for what purpose?
For general all-around revolver- a 3" K-frame in .357mag (or maybe a .41mag Taurus Tracker cut down to 3"). Well balanced, heavy enough to be a stable platform for .357mag with easy follow-up shots and good accuracy, light enough (barely) to carry. Put on some "Secret Service" boot grips for CCW, some larger wood for the field or range. I might also have it modified to DAO (but it is not a necessity). With heavy .357mag it is pretty much the minimum for bear defense and will work well for defense against mountain lion if you live in areas where that is a concern, with good .38+P and .357mag loadings it is great for CCW or home defense.
However, for "perfect" you need more than one (so I tell myself whenever I want to add):
-S&W 442. Too light for fun practice, but that same trait makes it great in a pocket. DAO is a good feature for a CCW revolver. Lately, I've found myself handling this more than my other guns for some reason. It is about the perfect pocket carry package (5 rounds of powerful, for pocket carry, .38+P), somewhat controllable for follow-up shots, reasonably accurate at SD ranges, and with wood grips it actually looks pretty good even with the utilitarian finish (and I actually like the look of the hump).
-For general carry it is close between the steel framed J-frame or a 3" K-frame if you want to carry IWB, OWB go with the bigger K-frame.
-For a woods gun, the Taurus Trackers in .41mag or .44mag seem to be it right now. Powerful caliber, relatively small and light package (the Tracker is equivelent in size to the medium frame S&W K-frames, most .41mags and .44mags are large-framed revovlers).
-For the range, a 3" or 4" K-frame shooting .357mags, or a nice N-frame (mine is a S&W 57).
-My personal favorites, I guess I have 4:
-My S&W 65LS and my Taurus 85CH for practical reasons (see general carry above, the 65LS is a 3" K-frame, the 85 is equivelent to a J-frame).
-S&W 57. It is an N-frame in .41mag, do I need to say more?
-My Uberti made Colt 1860 Army blackpowder clone. BP is fun, and this gun is just plain pretty.