[flipp3r]

You're leaving out many things about coffee. Specifically, caffeine, which energy drinks are often loaded with. Caffeine on its own can cause anxiety (See "Caffeine-induced anxiety disorder") and is linked to depression. Let alone workers consuming caffeine during work time with headaches(or other withdrawal symptoms) on their days off who still haven't figured it out the stuff is just plain not good for you.

[brom2]

I've stopped drinking coffee as it would frequently give me anxiety and sometimes panic attacks. I now drink tea or water at work. However, I still need to work harder on cutting down on sugar.

[andai]

I suspected coffee was giving me anxiety which bordered on paranoia. I stopped drinking coffee and it went away immediately. A week later (today) I had a cup to see how I'd respond. Severe anxiety came back within half an hour. Very interesting.

[emersonrsantos]

There's a third way, very popular among hackers, yerba mate. Used by South American people.

It has good caffeine content, but apparently has a slower absorption. Helps you to keep focused, without the strong highs and lows you have with pure coffee.

[craftyguy]

Yerba mate is my favorite. I wish it was more popular in the US.