My brother wanted to rewrite the prequels to make Yoda even more full of himself and wear his vanity on his delicate silk sleeves. Then, after the fall of the Republic... he would enter his repentant vagabond stage.

My problem with this treatment of Yoda is that he's 800-900 years old. Some people do go crazy and get different mental disorders late in life, but I think character is fairly well established after 800 years or so. Probably aren't a lot of life changing events after 60 or so... let alone 500 or 800...