This is interesting stuff, but I find that this sort of deep thought about one's PC is more useful in games that give it mechanical weight, such as SotC/FATE or Burning Wheel. With D&D, I find that it kind of gets in the way.
Also, I really enjoy figuring this stuff out during play rather than deciding it up-front.
Regardless, there's a lot to chew on here. My suggestion for practical application would be to pick, say, three categories from the article and come up with one or two sentences or phrases for each.
Role Model: Grimnir always looked up to Binwin, captain of the dwarven host. He hopes to one day serve in, and perhaps lead, the host himself.
Likes and Dislikes: Grimnir, unlike most dwarven fighters, prefers swords above the more traditional axes and hammers of his people. The finesse of the blade technique is one he hopes to master completely.
Home: Grimnir loves his mountain home beneath the hills Cairgorm; to him, it is more beautiful than any other land. He vows to one day return from his adventures and start a family there.