Although I prefer Darkest Hour and Europa Universalis 3, I've had a lot of fun with CK2 this last year. There's just so much potential for dynastic randomness to be had. For instance, whenever I name my heir after myself, it's assured that something stupid will happen to him. Thrice I tried this as Byzantine Emperor, the first Christophoros was slain by romanian mobs while governing, the second one became celibate, and the third one was a retard. After that, I just stopped trying to name them. The main thing that puts me off CK2 though is how the map always end up looking like absolute crap(are connected borders to much to ask for?) and how trying to manage a great empire usually becomes an endless string of rebellions unless you have a skillful and long-reigning king/emperor. Haven't really tried any of the expansions after Sword of Islam, are they worthwhile?