There seems to be a number of definitions of openness. Some think it means being able to enjoy the company of old friends and new acquaintances on any course - good, bad or indifferent. I suppose that is a form of openness, but under that definition isn't everyone open. Golf is a fun game, who doesn't enjoy the company of friends, especially while playing game?
Just because a golfer is interested in finding/seeking out great golf designs and attempts to identify why certain designs are more appealing than others through searching all corners of the globe and reading/researching the subject -- does not mean he can not enjoy a round on the neighborhood goat track with his son or daughter.
And I do not believe being member (or not being a member) of a golf course necessarily determines if a person is open or not open. In fact one sign, in my mind, of an open mind is the ability to indentify the weaknesses of their beloved home course or favorite course or favorite architect.
I may be accused of having a predispostion toward the old - but I would say my predisposition is toward excellent work, old and new. And how can a preference for excellent work limit my learning and playing experiences? I've played more RTJ (9), Dick Wilson(3), Rees Jones(5), Tom Fazio(2), George Fazio(2), Jack Nicklaus(4) and Pete Dye(5) designs than Raynor, Flynn, Travis, MacKenzie, Macdonald, Alison and Tillinghast. And just because I prefered Camargo to Coldstream or Kirtland to Sand Ridge or Cypress Point to Spyglass or Eastward Ho! to Nantucket, doesn't mean I will not try to play Pine Tree, Shadow Creek, Peachtree or The Bridge -- and play them with an open mind.
And to those architects who say my mind or this group's mind (if there is such a thing) is made up and why bother. I'd be the first to admit there are many on this site who are firmly entrenched in their views or who have developed very specific tastes, but among that group there are many differing views and there are also many who haven't made up their minds or are constantly developing their views - why not present your views to that large group. If you believe strongly in your viewpoint you should be able to present a very compelling case...on the other hand if you're not so confident in your stand, thats another story.
And finally on being open or closed minded, in my mind those who study and research and seek out great golf designs are amongst the most open minded. The reason they seek out information is becasue they want to learn and isn't that the true definition of an open mind.