I am creating a largely static site for the collections/archives office of a library. Since I am expecting most content to be created once and slowly appended or modified over time, instead of regular posts, my first inclination is to make everything a page.
On the other hand, I have pages/posts that exist in two or 3 categories that I would really love to be able to generate listings of and I cannot think of a good way to do this except by using categories and posts. I know that there is a plugin allowing you tag pages with categories, but get_posts does not always work when I do this.
Is the fact that I have content that needs multiple categories and have overlaps with each other more important than the fact that this content should largely be static?
I have an collection that is made up of sites dedicated to specific topics. If I made each of those mini sites a post type, I could then make the main page loop through those posts to create entries on the collections main page and now that as long as they were tagged properly, items would show up there.
So, is static content the only determiner of whether something is a page or a post?