I'm a writer and musician. Openly a fangirl into a lot of sci-fi and action. Also Broadway is my sprit animal.
Categories of Fandoms:

TV Shows:
Sherlock
Dr. Who
Supernatural 
(Superwholock for life)
Stranger Things
Once Upon a Time
Riverdale

Books:
Harry Potter (Ravenclaws FTW)
Lord of the Rings

Movies:
Marvel Cinematic Universe
DC 
Star Wars (Original Trilogy and New)
Pirates of the Carribean

Broadway Shows:
Phantom of The Opera
Les Mis
HAMILTON (kudos if you get the reference).

Anime:
Hetalia
Black Butler

If this list didn't scare you off or if you actually read the whole thing thank you cookies for all of you. 
Recomendations or sugestions are gladly accepted. From whatever fandom you're from I HIGHLY recomend you check some of the ones on the list above.
~Have a lovely day fellow readers.~