I know this might sound like a silly question, but here on Programmers (as well as on SO and Meta), I've seen quite a few indications that coffee is popular among programmers. Even the logo of this site features a coffee mug.
I've haven't ever drunk much coffee, but when I have, I never really noticed any profound effects on my productivity. Am I missing something? If I started to drink more coffee, would it make me a better programmer?