I think I drove Angela Duckworth crazy when I had her on because I never felt like we finished the topic of Grit. I always had more questions so I think we ended up with 3 podcasts with her on it.
Also, on "Mindset" it sort of shocked me when I realized I had a very "fixed" mindset when it came to improving at something like chess. I was always told I was smart so I baked that into my brain a little too much.