This is a clickable list of all the tags I've used to describe Podcasts and Audio Shows, including standalone Audio Drama.
Seriousness:
Comedy
Dramedy
Drama
Horror
Voices:
Single narrator
Two hander
Cast
Format:
Actual play
Dramatised
Fictional show
Found footage
Musical
Personal recording
Sitcom
Theme:
Fantasy
Horror
Improv
Puzzle
Romance
Science fiction
Superhero
Thriller
True crime
Urban fantasy
Workplace/Employment
Continuity:
Anthology
Serial
Standalone