Although this should go without saying, MGF (Maximum Game Fun) is completely subjective for your individual gaming group. You should always default to whatever is MGF for your gaming group; however, that is going to be wildly different from table to table.
And that’s totally ok! Just don’t assume that what is your Maximum Game Fun is going to be someone else’s! The function of rules and game canon is to provide a baseline backdrop, which you are perfectly welcome to tweak one way or another in the interest of MGF.