Caffeine is great. It lifts you up, gets you going, makes you more productive ... until you crash. Then it's not so good. Personally, my crashes are emotional things - I get grumpy and anxious*. I'm like the monkeys in the commercial below. It's all good until it isn't and then it's very bad indeed.
Tonight I had an epiphany about why I like the suds when I come home. I usually have some coffee or a Diet Coke around 3 at work. That's perfect timing for the caffeine crash to hit at 5:30 or so. The stress leads to an alcohol craving which leads to a Newcastle which leads to a Firestone Union Jack or a Harp or something like that. After the whole symphony of ups and downs is over, I feel regret, but was never sure why until now.
Tomorrow, no coffee after 9 AM.
* - This is adrenal gland exhaustion. Caffeine squeezes your adrenal gland until it's empty. Your body needs small amounts of adrenaline to operate properly and caffeine will cause you to drain it dry.