In one lifetime, you may have a magnificent and wise warrior queen who unites all the disparate tribes of the region into a mighty nation and is much beloved. Crusader Kings 3 stretches across about six centuries, and you’ll see dozens of rulers born, die, and give way to a new generation if you play all the way through.
This isn’t so much a suggestion to make you better at the game so much as it is to help you enjoy it more.