I drink up to 4 cups a day or zero per day. I might be a daily drinker for 2 months and then go a month or two without a cup or any caffeine source at all. I've

I drink up to 4 cups a day or zero per day. I might be a daily drinker for 2 months and then go a month or two without a cup or any caffeine source at all. I've never had a problem with caffeine withdrawal headache which is interesting. 23andme says I'm 'likely to slightly more coffee than average' and I am a slow caffeine metabolizer based on my genetics. The only coffee rules I really follow are 1) don't drink it if I'm tired - for whatever reason I feel nauseous if I drink it when I am actually tired, and 2) don't drink any after 3PM or else I probably won't go to sleep until 1-2AM.