The Archive uses these keyword themes:
Pregnancy/Childbirth
Wedding
Revelation - Lois
Revelation - Others
Comedy
Drama
Action
Tearjerker/Angst
Dating/Romance
Holiday/Special Event (Christmas, Valentine's Day, Birthdays, Anniversaries etc.)
Elseworld (major changes from the show's universe pre-pilot)
Alt-Universe (the alt-universe we saw on the show or other alt-worlds)
A-plot
Episode Related (To include Episode Rewrites, Missing Scenes, Episode Adaptations, Episode Tag-ons etc - basically any story which deals with a episode)
TUFS
Season Five/Season Six
Series
Round Robin
Villain - Lex
Villain - Tempus
Villain - Other (to include stories about Diana,
Trask, etc.)
Krypton/New Krypton
Deathfic
Poem/Song (to include fanfic which is written in the *format* of a poem or song only.)
Crossover
Main character not L&C (to get any Jimmy, Perry, Martha, Jonathan stories)
Challenge Fic
If that gives you any ideas for others you'd want to include.
LabRat