My reason for wanting stock is two part. First, I have not driven a tuned sho yet, maybe it is not as much of a change as I am expecting. With that said, I very much enjoy the stock settings for long highway jaunts. My commute, once a week, is an hour on the highway and I enjoy the stock setup for those rides.
One final reason but one I do not consider foremost as it is more "opinion" and I am sure others will disagree, tuning a vehicle reduces the longevity of it. The detune from ford was to save the drivetrain. The ptu is not well thought-out and failure rate increases as the volume gets turned up.