Number one, my Model 317, is a great plinker and when loaded with shot gives good snake protection in the desert.
Number two, a High Standard Supermatic, Model S-101, is a sentimental favorite. It was my first target pistol and taught me to shoot a pistol. I regret selling the one I had and it took almost 40 years to find a replacement.
However my favorite has to be this Model 41 which I bought new around 1960. It's serial number 9981; still with the box and most of the acessories, including the weight set, and an aftermarket gadget for cleaning the lead out of the muzzle brake.