I am like Mr. Doak, having toured or played 67 of the GD top 100 in the US, and a few less of the international lists. I haven't done the who's in and who's out list lately......
BTW, I think the least likely of the courses for me to play will be Royal Durban in South Africa. And, if it was no. 100, I doubt I would make a side trip to see it.
I also agree that courses don't need to be top 100 to see. I would go out of my way to play a Strantz, Raynor and a Colt and Allison, among others, as well as one course of almost any architect.