I grew up on CK1. I actually still have the collector's edition, i can say it influenced me to be the gamer I am today.
So much infant mortality and instances of harelip, but I powered through as the duke of antioch->emperor of byzantium+king of russia
an epic game that can probably stand up today if people have been making mods for it
also try for the glory and europe universalis 3 along with HOI2/darkest hour
I play hoi3 or darkest hour depending on if I want autistic OOB management or autistic kaiserreich/FODD map painting fun