After this question was closed:
What Star Trek episode to introduce a new viewer?
Wikis pointed out this question that remained open:
Which Discworld book to start a newbie on
There is no doubt those questions are both list questions, as every answer is worth the same and only the argument differs. This would lead into a pool because of the site's mechanics. Also, they could be classified as a personalized recommendation question that is restricted to a series.
But, as the op pointed out, we allow questions about suggested-order. This is an exception because, in my humble opinion, they fulfill the same criteria. Also, "where to start" question are a subset of suggested-order questions that ask only for the first item in the order.
Should we, as a community, define "where to start" questions and other exceptions?