Do you think your character has an ugly beard? Trim it! (And get a haircut while you're at it...) Want to change the name of your kingdom to 'Awesomia'? Do it. Does your faithful vassal have a stupid dynasty name or shield? Customize them! The Customization Pack allows you to alter all of these things in-game. It has no effect on gameplay, but perhaps on your peace of mind.

In-game barber shop: customize hair and beard.

Rename children born to all your descendants (not just your own children).

Name bastard dynasties.

Rename duchies and above, with adjective form.