It's extremely important to me. I tend to be groggy when I get up (idle mode), and coffee gets my brain and body into first gear. I justify my coffee habit with statistical studies that show students score better on exams when they drink coffee first. Also, statistically, Alzheimer's is less likely to occur in people who drink coffee. I drink it all during the day, but quit in early evening so I can get to sleep. When I was younger, I could drink coffee right before going to bed and still sleep! Those were the days.....