If you read the game of thrones books the characters read as different personality traits and you can see

A lot of different personalities can be represented within one person

Everybody has a little bit of Cersei Lannister, Jamie Lannister, Eddard Stark and Arya Stark in who they are

I remember when I watched the first scean of game of thrones with Stannis with his council and it reminder may have something I would say

When he was doing the letter writing scene