Is Coca-Cola (KO 0.98%) Warren Buffett's favorite stock? It might be, and it's at least one of his favorites. He has praised it many times for a number of its features, and he's used it on several occasions to demonstrate what he thinks constitutes a great business.Most Buffett fans know that he has said that his favorite holding period is forever. But did you know that when he said that, he was talking about Coca-Cola stock? He's held true to that view, repeating several times that he would never sell Coca ...