I too prefer a flatter radius. The time I've spent on guitar helped me establish that. I used to have an old Strat with a 7.5" radius. That thing gave a whole new meaning to the term "reach-around"! It was a veritable plethora of unintentionally muted strings & sloppy playing in general. I blame the "Z" axis you mentioned. I can see why the "thumb-over" guys like 'em though. For me, wide & flat is where it's at!