Dynamism or Charisma?

[Jessica]

I really enjoyed Jim's explanation from the Appendix (p. 218) of the difference between Dynamism and Charisma.

Talking about the Wright brothers, he said, "What they lacked in charisma, they more than made up for with their devotion to a momentous idea and the intelligence and dogged determination to pursue it until it worked."

Reminds me of Tiger Woods (who does have charisma, but...) who, even though he was already a champion, forced himself to unlearn and relearn his golf swing.

Have any of you ever tried to unlearn something you're already really good at? That alone seems like a huge challenge!

What did you unlearn, and why?