(wow this is quite old)

Personality

 Olaf is shown to be incredibly greedy. In the first game, he is only
concerned with land and power. He is also shown to be a rather
incompetent commander in the first game. He forgets to fuel his air
units, and uses his Battleships to fend off Submarine attacks, leaving
his base wide open for attack.
 As time goes on, however, Olaf grows to become a responsible
leader and it's shown he actually does care for his men. He is also
shown to be an excellent strategist in later games.