Oh man, I've sunk countless hours into CK2. Such a rich game and I highly recommend it. This post pretty much lays out a facet of what I love and alludes to the bigger picture: start with a historical setting and run with it, often diverging. One game I became the king of Ireland and then somehow the king of Britanny. I then only had female child heirs. They got overthrown and ended up cast out of Ireland. I was intr…
"Friends, countrymen. The rampaging horsemen of Kirghiz have long plundered the world and burned down cities and used the bones of our fellow Christians to fertilize their fields. We have heard from our friends in Gotland that Kirghiz intends to do the same to their houses, and we shall prevent this. Sound the alarms, muster the levies!" Two months later: "Er, never mind, Gotland surrenders." And a month later, "Friends, countrymen…"
Beyond that, it can be fun to watch just how screwed up the game can get sometimes. I had one playthrough where the Kingdom of Andalusia was located in Hungary, the Kingdom of Africa in Italy and the Kingdom of Italy in Africa.