I would like to think that most drivers would turn away from having #1 on their car, simply for the reason that the number they do choose, has sentimental value in so many ways (the number on the car of their first win, a number connected to family ties, location or local importance, a special year in your life or something along those lines).
I seem to remember a movie, where a race driver was superstitious about the number on the car and wouldn't race, if he could race with that number .... I also think there was an American Football and Baseball movie with a similar plot.
Best Regards,
Cal