I have heard, from several sources, that stating personal protection and protection of your family would be insufficient reasoning...they may deny your request, unless you can be very specific about your concerns for personal/family protection. I agree that the reason should be irrelevant as long as all of the other requirements are met.
This is just what I have heard...I don't have any proof of this.
I used carrying large sums of cash, similar to Moosie, and frequenting unsafe places at night and alone due to my job. All of which are 100% true. Don't try to lie your way through.