I like coffee. I like tea. I like sodas. Quite possibly, the stupidest thing you could do would be to come between me and my caffeine. You know what they say about mother bears and their cubs...? Multiply that by ten thousand, and that's how bad an idea it would be.
I take my caffeine in many forms. I start every morning with a nice sludgy cup of coffee. (Don't even bother trying to talk with me before I've had it). And maybe I'll have a cup in the afternoon. And at night. And as a social drink... The best coffee in the world is Peets Major Dickason's Blend.
Yerba Mate is great stuff, too. It is a tea drunk in Paraguay, Brazil, and Argentina. It has lots of caffeine, as well as other chemicals (thyobromine, thyobromide). It is a beverage of wellness; you drink that stuff, you feel good! Paraguayans insist that it cures liver problems, colds, impotence, kidney problems, etc. The great thing about mate is that it is a social beverage, intended to be shared among friends. You can buy it South American supermarkets (which you'll find in the Mission District of San Francisco, a New York Paraguayan barrio, or in Miami) or online. You should only have to pay about $5/kilo (that's right, they sell it by the kilo. Screw that wimpy 'pound' nonsense.)
Mountain Dew is spiffy. I believe it has more caffeine than any drink excepting Jolt. Plus, Mountain Dew is so chock-full of Yellow #5 that you glow in the dark after drinking it. At one point last year, Wayne and Greg obtained 23 cubes (552 cans) of Dew...