My favorite is whatever I happen to be holding at the moment - rifles: usually .54 cal and flint, although there are some cappers in the mix, too. Revolvers: too many to narrow it down, but lately the .36's are getting more range time.
Favorite Rifle: the .40 cal capper Dad built in 1970. I did the brass work on it, and some of the finishing. It doesn't see as much range time as it should, but it's more of my winter gun.
Favorite Revolver: Dad brought home a Colt 1861 from an Ohio Gun Collector's Show in about 1968. I have it now & split the time between it and a new 1851 Pietta.
As time and weather change, favorites, change, too. It's silly to try to narrow something down to only one, whether vehicles, guns, dogs, food or the wimmens :wink: