1 day in, we've established there are stay-at-home types and explorers.
And then there's Mike with apparently way too much time on his hands to have played that many courses so often AND I know he gets around too! 
I'd guess that many posters play both a bunch of courses near home many times AND explore hundreds of courses that they've played only once or twice.
Stewart,
That's my story in a nutshell. I've played 1309 courses, most of them once. I've moved a few times where I establsih a local rota of public courses and probably most relevant never joined a private club so didn't feel compelled to make those personal economics work.
Most important of all, I never tire of the excitement of playing a new course, great or small.