I made this to discuss a central aspect of a few other suggestion like this or this. Multiselect traits.
A multiselect trait is if you can select not just one category but a few. Instead of haircolor "blonde" you could choose "red" and "blonde". This offers more flexibility for creating a profile, instead of two traits like hair-length and hair-color a single trait named "hair" is enough. The categories (Black, Blond, Blue...) and (Bald, Floor Length, Knee-Length...) are put together. It shows up on the profile like this:
Hair: Knee-Length, blonde
Genitals: Penis, Large, knotted, double
Species: Feline, kemonomimi
All information about the character's species/hair/penis with one look and you only have to select as many categories as you really want. New combinations are possible.
Supernatural powers: Demonic, magical, shapeshifter.
Also multiple-choices.
Setting: Historical, Science fiction
Instead of Post length: "varies", which doesn't say much:
Post length: Page, Multi paragraph, paragraph.