Replacing Warren Buffett is perhaps the ultimate poisoned chalice. With him at the helm, Berkshire Hathaway Inc. (BRK.A, BRK.B) has delivered a staggering total return of more than 5.5 million percent to shareholders since Buffett took over the company in 1965.

Warren Buffett's retirement marks the end of an era for Berkshire Hathaway, but his investment principles of contrarian thinking, cost-consciousness, and faith in well-run companies will continue to inspire investors.

Our columnists answer your questions on the Oracle of Omaha’s legacy and succession plan for Berkshire Hathaway.