I'm not a big coffee drinker because I prefer tea but I suppose I probably consume around 2-3 cups a day. I have an ectopic heartbeat which is not serious but it means I get a lot of palpitations which seem to get worse when I drink too much coffee, probably caused by the caffeine. Also I only drink it in the morning because it is a stimulant and I'm more likely to be sleepless if I drink it before I go to bed.
I'm one of these people who likes to try out different types of coffee although I usually go back to Americano. I enjoy a cappuccino if I am out with cocoa sprinkled on the top although I was reading that chocolate spoils the true flavour as it is too sweet.
When I am home I prefer to drink tea, probably because I am British and we are a nation of tea drinkers, but the occasional cup of coffee is nice for a change.