I decided to make a sub-class for every class. Each has a connection to my world and is available on my GMBinder.
Below are some of my favourites.
The Fate System originally came from an effort to make the Inspiration mechanic in Dungeons & Dragons 5th Edition more interesting and dynamic. Creating a more memorable, rather than the usual forgettable experience players and Dungeon Masters have with Inspiration. However, the system has since grown. In addition to replacing Inspiration, this system allows players to express the individuality of their characters.
Any art I have used is credited on my GMBinder.