My fingers aren't particularly long, and not especially thick, but I find it uncomfortable to play a narrow neck, i.e., a 42mm or 43mm (1 9/16" - 1 5/8") nut width. That is the main reason I got into building my own guitars (and then for other people). I wanted a wider neck, which couldn't be bought over the counter, so I made myself a guitar with a 46mm (1 13/16") nut, and later, 48mm (1 7/8"). These I find extremely comfortable to play, and most of my customers over the years have preferred these sizes. I also prefer shorter scale guitars.
Of course, at the moment, I can't play any size neck, or build anything, as the wrist op I had in November didn't go according to plan, and I can't rotate my forearm at all now. I may need more surgery in the near future to correct this problem