Though Fail_FandomAnon is about fails and fandom, there are certain threads that pop up all the time, usually at least once a post.

• Things You Wouldn't Admit Unanon
• Unpopular Opinions
• Fandom/Non-fandom Venting
• Foreign-language threads, especially by the Scandanonnies
• Things You'd Like to Say to Your F-List/to an F-Lister (a/k/a “Dear F-Lister” or “Dear Fandom Friend”)
• Things Making You Sad/Happy/Annoyed Right Now
• Books threads
• Cooking/food threads
• Makeup/beauty threads
• Sports threads
• Current events threads
• Various types of rec threads, especially Fic Recs (see also Academic)
• EFW threads, although some nonnies detest them
• “Ask Me Anything”
• Fic Research/Unfuck My Plot threads
• Tumblr wank threads
• Discussion threads for various genres and canons (anime, comics, movies, etc.)
• WIPs/“Two to five lives of something you've written”