I frequently print with the effects of toning in mind. I would say therefore that it is best to take into account what toning will do for you when you are evaluating your test prints.
I don't care about consistency per se, but like to be able to depend on consistency in the situations when I need it (I hope that makes sense).
EDIT: I should mention that almost all of my printing is on RC. Behind glass, I don't think you can tell the difference between FB and RC.