You guys sound like scientists. I started drinking coffee black when I started out in the Army in 1965. I can pretty much drink anything, except the strong stuff from Starbucks. I had it once while waiting in an airport and Starbucks was all that was available, but couldn't finish it. At home we use Maxwell House medium for the coffee pot and Victory brand Morning Blend for individual cups. We have a high-tech ($29.95) Hamilton Beach which has a regular pot on the left and a K cup deal on the right. I like the Victory coffee best, plus it is a Veteran owned company. We buy it at Odd Lots, but it's available from Amazon and factory direct. I am too cheap to pay the price for a regular Keurig machine.