Folgers instant (like to be able to control the Caffeine dosage per cup and I don't like to wait).
If I could get Guatemalan Antigua freeze dried and on sale, I'd be slugging that back.
If we run out of coffee and I'm jonesing for a fix, double bagging Celestial Seasonings' Fast Lane tea is the methadone of the methylated xanthines.
It is interesting to note that shortly after coffee was introduced to England the Enlightenment, which had been meandering along, took off. Many of the principals imbibing crude roasts while generating the future. Ben Franklin, Joseph Priestley, Erasmus Darwin, etc., hunkered down in the London Coffee House, sweat pouring from the palms of their hands as fast as ideas flowing from their minds. For the sippers of weak tea the switch to strong coffee must have been to the intellect what steroids were to Barry Bond's swing.
There are drugs and there are drugs and I'll have another refill.