Reflecting on my whirlwind of keyboard tryouts in the last couple of months, one of the things I realized is that finding a switch (and board) you like isnt enough to keep you happy. At least for me, anyway. Because if you put away all the other boards at that point and use your 'favorite' exclusively, in time you get acclimated to it. What that means, I think, is that in time two things happen: - you start noticing "flaws" that you either didnt notice before or werent meaningful before; but also - you get used to its feel and so boards that you thought were 'light' suddenly one day begin to feel stiff, and etc.
This is where keeping a couple of reference boards -- that you had previously rejected -- under the bed is a really good idea. Typing on them can remind you why you liked what you liked about your favorite board. The sole function of these reference boards isnt to be used but to remind, to reset your senses so you can appreciate anew your favorite board every few weeks. They can remind you that your favorite keys are in fact the right resistance for you, and so on. In other words they can remind you of all the reasons why you liked what you liked about it.
Nothing like a little comparison for perspective (and contentment!).