@Alfred Packer: VV doesn't make Rome a CK, but the character system is now definitively better.
First of all, the family of the character is now clearly visible (this is a *huge* improvement in my opinion) so nepotism is now much easier
Secondly, the characters have realistically feeling ambitions, which as the player one can attempt to (ab)use (like a character wanting to become a Legate -> make him a Legate and he will get Martial+1) or avoid by throwing them in the dungeons (like a character wanting to become the ruler who is also a rival of the current ruler... might be time to send him to an exploration voyage to the dungeons).
Inheritance is changed via the laws. If you are in a monarchy where the eldest son will be next king, all you have to take care of is to hope you get a son. Likewise, you can change the laws if you want to get somebody else to the throne (it is not cheap in stability though). If there is no legal heir, then the advisors support their own favourites to heir, and this may cause friction. You can see who is the heir apparent and who are the other two characters considered by the characters for next king; if the legal heir is not the heir apparent, you are in deep poo unless you take care of the situation (make the legal heir more popular (for example, give him four ships and send him pirate hunting; due to the combat engine you will never lose a battle with four ships vs one, so popularity is guaranteed to rise), send the other heir-candidates to the dungeons, etc).
Best of all for characters however is the way governors now rule whole areas instead of spesific provinces. Much easier on the micromanagement side, and also easier to find good governors (or loyal governors, as it may sometimes be). Also, the advisor system is excellent for Kingdoms, and works ok in republics too (the whim of the populists is hard to control at times).