I've been carrying for about a decade now, and when I look back, one thing that strikes me as especially absurd is the idea of a carry rotation. I used to carry whatever I happened to feel like on a given day.
Now? Now my usual carry piece is Insert ubiquitous plastic pistol here or, similarly, insert smaller ubiquitous plastic pistol here, in the appendix position. The only change / addition to this is pocket carry, which means I'm carrying a S&W 432pd in a Desantis pocket holster or, when I absolutely can't carry a gun, a Beretta Jetfire in .25ACP slipped into a pocket.
*Ubiquitous plastic pistol being S&W M&P, Walther PPQ, M&P Shield