Character Archetypes

http://adulted.about.com/od/howtos/a/archetypes.htm

Which archetype seems easiest to write?  Which do you think seems the most difficult?  Why?  What archetype do you understand the least?  Why?  What kind of hero's do you like telling stories about?

    The archetype which seems easiest to write is the Herald as the role it plays is simply to act as a catalyst, which can be done in simple forms. Additionally, the archetype can be fulfilled by a very minor character, such as a mailman delivering a letter or a concerned neighbor telling the protagonist about something. The one that seems the most difficult is the threshold guardian as it needs to test the hero in a way that correlates to a trait or need that must be met for the hero's growth and change over the course of the story. As there can and likely should be multiple guardians which can test different aspects of the hero, it adds another level of complexity. The one that I understand the least is the shapeshifter. I don't fully understand what the article means when it refers to the animus and anima and the explanation is unclear as well. I like telling stories about heros who change a lot over the course of the story, while maintaining core aspects of their character, especially if those core components are challenged throughout the plot.