I am certainly no aficionado on Coffee or Tea. So if you are horrified by standard tea or instant coffee drinking, look away now.
From my early teens I was a massive tea drinker, as my family were.
At the height of my tea addiction, around 4 years ago, I was drinking around 10 mugs on a working day. And I remained a solid tea drinker (and we are talking standard British run of the mill tea bag tea here) way up until a couple of years ago. At first it started with a single mug of coffee when I got up, then tea for the rest of the day. Then it progressed to coffee throughout the morning, and swap to tea in the afternoon. Now its pretty much coffee all day.
And in the last 18 months, my wife has got me addicted to costa coffee. And I struggle to drive past my local one on the way to work without stopping for a large cinnamon late every morning..... mmmm

(I also really enjoy a nice lemon green tea every other day or so at work.)