In my teens I relied on average reflected reading of the scene.
In the early 80's, I was often disappointed with the exposure of my 35mm and 120 negs.
One day I stumbled on Fred Pickers "Zone VI Workshop". Finally, I understood how an exposure meter worked. I couldn't afford a nice 1 degree spot meter, so I started using incident readings as my method. It usually gets me close.
Jump ahead a few years - I had been subscribing to Pickers newsletters, and when I received #51, June 1987, he described what made very good sense - reflected reading of the brightest part of the scene and placing it on zone VIII - that's it.
I have recently acquired an old Zone VI modified Pentax Spot meter and was going to give this method a try. I was wondering if any here use it, have used it, can think of any faults in this method.