But I'll try....
.22 RF (don't shoot them much) - Ruger Standard Automatic (bought it in 1969).
Center fire pistol - S&W Model 29-2, light lead loads, don't have to pick up brass.
Center fire rifle - hard..... Maybe my AR-180. Just bang away, loading has been a set standard for 30 plus years.
Others make me have to/want to think about how the loads are running.