I'd like to propose a built-in grouping of different types of fonts - deco fonts, text and display, scripts, handwritings, etc.

I know such a distinction would always be quite arbitrary, but at least there could be these groups:

-Serifs (all serif typefaces with at least 4 different fonts - regular,bold,italic,bold-italic)
- Sanserifs (all sanserif typefaces with at least 4 different fonts)
- Scripts
- pictograms (like dingbats etc.)

Optional groups:
-small caps
-decorative fonts
-header fonts
-handwriting
etc.

kcm_fontinst could have a preconfigured list of the most common fonts used in Linux systems, which would then be overruled by any user configuration.

Reproducible: Always