To my mind theres two kinds of caffeine junky: a) classy - coffee - especially the one that drunk the right kind at the right time of day (like me), or b) borderline meth addicts who get pumped up on red bull/coke etc. Then theres the people that drink english tea, but to my mind they don't factor in as real people. Chinese teas/chai are cool though...they don't taste like someone vomited on some clay and boiled it.
In summary - a) cool, b) weird and slightly scary.