What does it take to change an opinion? Can you provide examples of a belief or conviction or opinion you used to have and what persuaded you to change your opinion?

Sometimes I get the feeling that many don’t have confidence in the ability for a person’s beliefs to change. I’ve never been so pessimistic about humanity. Myself, I changed my religious convictions around when I was 17. I really hated sushi at first but now I absolutely love it. I stopped believing in free will when I was 28. And recently I’ve been contemplating having children, something I never thought I would ever have the interest to do.

What kind of opinions and beliefs have changed with you? What do you think it takes for a belief to switch from one to the next?