Perspective (the way I see it)
I know that it's supposed to be a conundrum that reveals if we are optimists or pessimists. If you say that the glass is half full, then you're an optimist and you're a negative pessimist if you say it's not. To me, it's BOTH half full and half empty. That's my holistic perspective. Having to pick one is like asking, "Do I have a left eye or a right eye?" Obviously, I have both.
I understand the importance of being positive, but I won't allow myself to ignore the other side completely. Balance is a hard concept for many people. Not everything is simply black or white; there are many gray areas. Understanding the complexity of these gray areas in life are important. For example, there are many pros and cons of buying a used car that you should consider before you purchase one. It takes more perspective to see how large, thick, dark, or light the gray areas are (it's not just 50 shades).
Whenever I look at an issue, I try my best to see it from a balanced perspective. It's not always easy, but it's sometimes necessary.