I drink tea because I used to drink lots of coffee, and the caffeine would get to me sometimes. Give me the shakes, stomach aches, etc. So for a while I stopped drinking coffee, then started again later.
They usually say caffeine is good for headaches, but I found coffee just GAVE me headaches, and once I stopped drinking it again (this time for good) I never got random headaches again...only time I get headaches now is if I'm sick.
I wanted to something to replace coffee, well not so much the coffee but the ritual of coffee, which I would have after meals. So I started with tea (crappy bagged stuff) and found some decent Stash teabags, which got me turned on to green tea, and then later to loose tea, and then to Adagio, and then to here, and then...
In summation: Coffee bad, tea good!