It also depends on what you're interested in!

If the hot eggs are going to be powdered, I want hardboiled eggs even though they're always "cold" (well, more like room temperature) at Fairfields.

And as a semi-vegetarian, I don't care what if any meats they have, but I want to make sure they're well separated from the eggs (so people don't try the same utensil for both).

So not everyone evaluates breakfast the same way, and so I think it may be impossible to create a universal ranking that everyone agrees on.

And to complicate brand rankings more: For some breakfast things, even a given brand can be inconsistent. Many, but not all, Fairfield have apple juice. If you have "overcooked" orange juice and "oversweetened" cranberry juice, then you might only want apple juice, but the occasional Fairfield has only "overcooked" orange juice and "oversweetened" cranberry juice, no other juices.

So brand standards only get you so far, and then beyond that there's differences from one hotel to the next in the same brand.

So how many different hotels in each brand do you need to have stayed at to know you're not playing "blind men and the elephant" in your ranking of those brands?

I've stayed at one FS Marriott that uses powdered eggs in their lounge. If I had assumed that all FS Marriotts were the same, I could have come to the conclusion that their lounge breakfast stink. But that's only one FS Marriott, others I've been at use real eggs.