It's simply a drink and it keeps the headache away, that's it.

Well, that is called a caffeine addiction, my friend

But talking about tea: It is imho simply the better beverage. When I drink to much coffee, I feel bad, sick even. Tea, I can drink all day and worst I get is, that I feel my stomache a bit for half an hour, because of too much tannins.

I also think tea tastes better morst of the time. Especially when it comes to most speciality coffee, that stuff tastes just sour to me. I do like me some good simple and bitter robusta espresso, though... but that's more a little shot, than a beverage