During his live he's getting more and more experienced and he'll also change his look.
Last one is for the intelligent heros.
Molyneux currently thinks about rebuilding the whole British Empire of the 6th century for the game-world. To gather peoples attention you'll have to kill monsters, deliver stuff and complete quests. During the years, your actions will be known across the whole land and you're something like a Rock-Star for this age. Ego won't have pre-scripted character actions like Baldurs Gate 2, people will behave dynamically. The whole Fantasy-world will be simulated, while day and night cycles will be the easiest thing to do.