There are a few fundamentals of investing that virtually everyone should follow, including diversification. It's one of the safest ways to ensure your portfolio is balanced and you reduce risk where possible.Despite how important diversification is, it's OK to admit that not all stocks are created equal, and some have more of a special place in your heart (and portfolio). I'm no exception.If there were only one stock with a special place in my heart that I would buy and hold for the long haul, it would be M ...