Yes, but only if done properly.
There might be a thin line between what is personal preference and what is not only personal preference.
For example, I could say for some hypothetical book series, that you read it in the order it was published in. The fact that the order is the way it is does not mean that the order is good or bad, it simply describes what the order is.
I, perhaps, may have been able to equally choose a chronological order. Why is a chronological order better or worse than an order by date of publication, if at all?
Is it because, as an example, that's what our hypothetical author himself or herself recommends? Is it because reading by the order of publication means the story gets all jumbled up and some events are read in the wrong order? Or is it because you simply prefer that order, and it is just how you're used to reading those books?
It is thus important to be as objective as we can when describing reading orders.
Is the order the author prefers objective simply because it is the author who has preferred it? Nope. However, if the author has good reasons for that order, then that order might be objective.
What makes a reason "good"? And is that an objective measure? As you can see, quite a few questions must be answered in our minds before we begin writing about the reading order we wish to write about.
It is thus also important to define what level of objectivity we are talking about here. If we are to consider the strictest sense of the word, then potentially lots of possible reading order suggestions are thrown out, because, well, they're not objective. But if we are to consider a less strict sense, then how much "less strict" are we considering here?
My personal suggestion is that answers to reading-order questions must:
These three requirements are not always easy to achieve, and for some types of books, they could potentially be extremely difficult to fulfill successfully, but I think they may help to avoid answers that are based on mostly personal preferences and perhaps other non-objective answers as well.