LOL, I am the same way. The gun I use the most in my Walther P99, but when I go shooting I take everything, and have to think about where the safeties are and such.
I liken it to going to the gas station in one of my cars, I have to think which side the filler is on...
Try switching form the Colt MKIV to the Mitchell P-08 Luger to the S&W wheelguns to the High Standard to the PPK. It's like taking an exam. THEN there is picking up and separating all the brass...
That's why I have been carrying lighter range cases in recent years, sticking to one caliber a day.
I notice I hit less on the days I bring many of them.