What is the author's tone in The Essays of Warren Buffett: Lessons for Corporate America by Warren Buffett?

The essays are written by Warren Buffett in the first person singular and plural when referring to his activity with Charlie Munger. Buffett's writing surprisingly is fully subjective and enjoyable about the most objective and potentially uninteresting matters of corporate structure and financial investment. Buffett writes with a modest, self-effacing gracious and considerate down-home manner unexpected from a hugely successful billion-dollar owner/manager.