Most movies, TV shows, and episodes are tagged using their full titles (e.g. add /tagged/The-End-of-Time to the URL). Most people and characters are tagged using their full names (e.g. Ellen-DeGeneres).
Memes and Tumblr fads
Doctor names are spelled out (e.g., First Doctor)
Avatar: The Last Airbender/The Legend of Korra:
Individual books and movies are tagged without the “Harry Potter and the” (e.g. Deathly Hallows).
Once Upon a Time: