A little related to something I brought up in the product updates thread the other day.
It only really addresses the issue for manga, but users being able to edit the “More Information” section and contribute Anilist links the same way we can add “Where to find” links would reduce friction for users that want to add that information, and it would reduce the amount of verification and manual work Brandon has to do when people send that information in a feedback report. Then once something’s linked to Anilist it can have its tags imported, since they’re mostly 1-to-1 matches with Natively tags.
For tagging non-manga, what dissuades me from doing it is just the sheer number of available tags. Especially since only one tag can be added at a time, it’s a huge hassle to go through the entire list of tags and decide which ones apply. So rather than a general prompt from the site to tag something, maybe a more micro-scale suggestion would be less daunting? Like finish a book, and Natively shows a prompt asking something like “Would you call this book #Fantasy? How relevant do you think #Family Life is to the story?” with random tags presented. Or even a separate page with a tagging tool, where the user gets presented with a tag along with a selection of their finished books, and can select which books that tag applies to.