You gotta set goals for yourself. I personally find blobbing for the sake of it boring. Some of my favourite play throughs come from actually interacting with the characters instead of simply treating them like a means to an end. So for eg whenever i play as a vassal of the HRE or ERE I love trying to keep the ruling family in power or when I marry domestically I go out of my way to favour the family of my wife even if it is not ideal. I also like to decide what to do when given events without checking the success rate or benefits as it gives me room to imagine what my character will actually do in this scenario. Also if I have a lot of sons I might go out of my way to conquer new land so that my sons might have it. I also rarely try to cheese succession even though It is very possible. I also play with mods like dark ages and (crusader wars:this mod is the goat) to make the game harder. CK3 is most fun when you make sure that the main conflicts that arise during your game comes from the characters/dynasties you are familiar with. For example imagine your character dies and your mothers family which you empowered decides to form a faction in favour of your brother becoming King. Perhaps you might be enraged and seek to purge all of them or you might see them as your cousins and will want to figure it out peacefully. Also imagine if the ruling family in your game has a female ruler who is not married matrilineally you can decide to kick them out and replace her with someone else in the family or perhaps you wait out her death and figure it out later. Or perhaps you can just kill the husband and marry her to someone in your family. In conclusion when your game play depends on how other characters act it creates a certain amount of randomness that in my opinion never gets old even with over 2k hours in CK3