I think my experiences also led me to a change of career from working with the military in Saudi Arabia to teaching English. I remember changing my mind but don't remember the decision coming after a particular experience.

I did however lose my aversion to peanut butter with the help of mushrooms. It wasn't something I was looking to do, but my best friend, knowing how much I hated the stuff, brought me a big spoonful, actually unaware of my state of mind. In my open state I ate the whole thing and found it absolutely delicious. Not earth shattering but another example of how these things can clear away fears and aversions.