Warren Buffett during an interview with CNBC's Becky Quick on February 24, 2020.

My first experience with one of the men Peter Thiel called a "sociopathic grandpa from Omaha" was in the early 1990s.

Joe Kernen and I were winding up a "stocks to watch" segment and discussing Berkshire Hathaway's earnings. As part of that discussion, we chatted about our favorite companies within Warren Buffett's portfolio.