Ruler Hobby is inspired by CK2's character focus. Feeling that make sense to me, I made a simply version into this mod as well. (Way Of Life DLC rip off)
What does it do?
Ruler has their own level system, which can level up by Holding Campaign or Managing Empire.
When Level up, you can gain some influence and unity.
Every Ruler can have one hobby at a time (Gestalt Empires has their own), giving a boost to Empire. When having a same Hobby several times, they can decide to become the expert of that Hobby.
You can tell Ruler to focus on certain Hobbies category, or favoring certain Hobby so they will do that whenever they can, as long as they have experience on it.
Every time your Ruler has new hobbies, they gain Campaign point (s). Campaign Point are used to active Ruler
Campaigns, and Ruler Campaigns will appear from time to time, some of them are determined by Empire's ethics & civics.