An interesting thread, Dave
With my Pentax gear, I mostly use autofocusing lenses and compose through the optical viewfinder. I always use back-button AF, and typically a single selectable AF point. I like to be in control of what the camera and lens are focusing on and when, especially as I'll often focus and re-compose.
I like to have the scene more-or-less in focus while I'm composing, so I'll initially pre-focus on an element in the scene, compose, then perhaps re-focus as necessary before taking the shot.
I generally (though not always) shoot a scene with a little bit of space around it, so I can crop slightly in post to get exactly what I intended. I also find this helpful if I'm using a lens that requires distortion correction, as elements at the very edge of a tightly framed scene can sometimes be lost due to that correction. ..