Coffee became my ambrosia when I went to night school for business. I worked a full-time corporate job while having two small children in day-care, a working wife and taking classes every night and weekend meant there was no way around being overworked. Since then I have made a minor hobby out of coffee consumption.
Bean, Roast, Grind, Water, Temperature
And a few other things like pressure and method of prep which I’ll ignore here. Lifehacker talks about the importance of one of these, temperature.