Experience
Even though I've never actually worked in the tour industry, I've been lucky enough to have been on numerous self driving tours, organised and planned by myself.
Starting small with day trips around the UAE in my Cupra, moving onto numerous rented supercars starting in 2009, and all way to my most recent trip in a rented Mercedes AMG GT to one of the most awesome mountain roads in the UAE. My first full multi-day cross country trip was touring Italy for 10 days in a Alfa Mito, starting in Milan, going through Florence and the Tuscan countryside, to Rome, and then upto the Italian Grand Prix back in 2012.
In 2014 I toured Equador for 5 days in rented Mazda pickup truck, with highlight of driving half way up the volcano Cotopaxi. In 2016 me and my other half went on the longest tour yet in my now sold 350z (and probably the most expensive tour still) driving from Manchester to Venice and back over the course of 14 days. More recently we toured Iceland in the middle of Winter in a Mazda CX3 - braving 70mph winds up in the mountains, on icy roads with sleet and snow falling in at night.
I've now just recently come back from mini tour of Portugal which has made me want to take my recently bought e86 on another long distance Europe trip.
So hopefully that gives everyone enough info about me.