Whatever I have at the range that day
seriously if I had to pick just one it would be my Buckmark .22. Lots of fun in a inexpensive gun and caliber. In centerfire the CZ 75 9mm hands down. Love those 2 guns.
All are fun in their own way. I guess that is why for guy who thinks of himself as more of a rifle type of guy I ended up with a safe full of pistols LOL