Unless I am working with the progressive, I run things in 1-2 box quantities. So, it's usually 20-50 rounds for rifle cartridges and 50-100 rounds for revolvers.
However... there was a time when I only had a single stage. At that time, I liked to have brass sized, primed, and ready to be loaded, to allow for more productive loading sessions when time was limited.
I once sat there, operating the press handle 3,800 times in a row, to decap and size 9mm range pickup brass. It was a dumb idea, and my body made me regret it. I don't think I set foot in the reloading room for about 4 months, after that....
"Such is the strange way that man works -- first he virtually destroys a species and then does everything in his power to restore it."