I mentioned in the last post that I'm not a coffee drinker. This post reminds me that I appear to be in the non coffee-drinking minority. I remember being told that I'd get hooked once I got to college, but I never felt the need. Partially, it's because caffeine doesn't really work as a stimulant for me (although it does appear to help my migraines).
The real reason I haven't really tried coffee or other stimulants is that I simply don't stay up late to finish work (I have stayed late to finish work, but that has only rarely cut into actual sleeping time). I am not a slacker by any means; in fact I usually take my responsibilities too seriously. Regardless, I have never pulled an all-nighter. Most of the people I knew in college who drank gallons of coffee and pulled all-nighters regularly didn't have any more work than me (in fact, as a geology major I had considerably more work than most) and they probably got about the same amount of sleep. They just became nocturnal. I never understood what was so heroic about that.
I'm a morning person. When it's past my bedtime, I'm simply not functional and it's better for me just to go to bed. I can wake up obscenely early in a pinch, but I need to get at least a couple hours of solid sleep before I'm functional again. My personal internal clock, which I was able to follow in grad school, prodded me to go to bed at 10:30 or 11, wake up to pee between the hours of 3 and 5, sleep somewhat lightly from then on, and wake up for good between 7 and 7:30.
I'm fortunate that my personal sleep cycle fits well with standard American business hours. Too many of my friends are caffeine and/or sleeping aid addicts. I think they'd save a lot of aggravation (and money) if they could just work out a schedule that would fit with their internal clock and would stop stressing out about "insomnia" when the sleep they do get adds up to at least 8 hours.