Granted I'm only 28, but my relatives along with several friends are amazed at the fact that I make it a point to not drink coffee. I hate the notion of having to rely on something(y'know, aside from food and water and oxygen) specifically designed to give me a mental boost. I always figured if I was falling asleep midday it was because I was wasn't sleeping well or something of the sort.

It's hard because I also want to get the benefits described in these studies, but don't want to become dependent on caffeine to get through the day.