Year round, I rotate between these guns most frequently (pictured from smallest to largest):
S&W 642, .38 Special, pocket gun. Sometimes carried as a primary, often as a BUG:
S&W Model 66-1, 2.5", .357 Magnum, IWB using a FIST #20.
Ruger Police Service Six, 4", .357 Magnum, IWB using a FIST #20.
S&W Model 28 Highway Patrolman, 4", .357 Magnum, using a Lobo Gunleather IWB.
Lately, I've been carrying the 642 most often, though most of the time as a BUG to one of the other three. My favorite gun to carry is the Model 28, as I shoot it better than any other.