Songs that use swear words or slurs, either in the title or somewhere in the song. Examples: Fuck, shit, damn, etc.

BGs or songs depicting various weapons for fighting like swords, staves, or armored vehicles like tanks.

BGs or songs about dreaming or dreams (in the context of what people can experience while sleeping).

BGs or songs depicting people holding or firing guns or other ranged weapons.

BGs depicting various technologies like music players or phones. Likely will have game consoles, too.

Songs or BGs depicting people playing sports or any kind of competitive athletics.

Songs about certain shapes.

Songs about specific products.

BGs, SBs/vids or songs depicting various methods of transportation like boats, trains, cars/trucks, planes or spaceships.

BGs depicting various games like board games. Might include depictions of game consoles.

BGs that depict fireworks in any context.

BGs or songs depicting people displaying distinct emotions or titles stating certain emotions. Must be more than just a standard smile or neutral look.

Songs or BGs depicting people directly manipulating water or ice.

BGs or songs depicting creatures using or manipulating lightning. Must involve a direct manipulation, not just pictures of lightning strikes/storms.

BGs or songs depicting people using fire in magic. Must involve some creature directly manipulating fire or heat, not just a picture of a wildfire or volcano eruption.

BGs or songs depicting dolls or toys.

Songs that directly mention colors, or songs/maps that depict rainbows. Will not include rainbows in the context of LGBT.

BGs or songs directly mentioning clocks, dates and/or times, or celestial bodies like the moon or Sun or planets.

BGs or songs about books or with books or scrolls in them. Currently doesn't include single pices of paper or envelopes, but it could.

BGs or songs about people with wings. Can be angelic, devilish or other kinds of wings, but it must be a human or humanoid and not some kind of anthropomorphized person or someone that is normally a creature but has transformed into a humanoid shape.

Songs made by or about Vtubers.

Maps or songs BGs depicting life in school. Does not include songs about idol groups unless it is depicting them in school outside of any context of idol songs, etc.

BGs depicting royalty or nobility in some fashion. Might re-categorize into 6.

Should go into Casual.

Maps with specific names in the title.

Bgs or songs depicting monsters or other fantastical creatures. Might be separated into outright monsters and other fantasy/mythical creatures like dragons and fairies.

BGs depicting mechas or power armor. Might also include robots in general?

BGs of single people.

BGs with three or more people.

BGs of two people.

Maps or BGs about various drinks. Water can be included, but it must be in some drinking container such as a bottle or glass.

Maps or BGs about fruits and vegetables.

Maps or songs about specific foods or meals, or displaying meals or people eating.

Maps of individual flowers or bouquets of flowers, or of petals or flowers flying in the wind or placed on the ground for aesthetics.

BGs of cats or catgirls.

BGs of people sleeping or dozing. At minimum their eyes must be closed and laying down or sitting with their heads drooped or on someone else.

BGs or songs about candies or other sweets like cakes or desserts.

Songs about or titled with body parts outside the context of holidays or other categories.

Songs/BGs of people engaging of athletic activity like running or jumping. Does not include athletic activity in the context of actual sports such as track & field or racing.

BGs of anthropomorphized animals or of human-like people with animal characteristics.

BGs with regular Earth animals in them, from pets to wild animals.

SBs of people in superhero suit, or in other suits or coverings.

BG of people in military uniform or in school uniforms. The latter may be subject to whether I think it's sufficiently cool or unique enough to be separate from a standard school uniform.

BGs of man in suits or tuxedos or otherwise dressed in very formal attire.

BGs of people in typical witch/wizard attire.

BGs of people wearing religious attire. Nun outfits, catholic/papal attire, or priest garbs.

SBs of people holding or wearing accessories, such as bows, jewelry, purses, or items like parasols/umbrellas. Might separate jewelry from this. Can be independent of other categories like Flowing Dresses if there are other items on the dress that aren't part of the dress itself.