I'm mostly a coffee drinker, but I do have a cup of green or white tea every workday morning during my commute. And, because my wife's sister has a tea shop in Southern Germany, we get LOTS of different teas. Here are three of my faves:

Margaret's Hope --Darjeeling

Gunpowder --green

White silver needle --white

For teas without caffeine I highly recommend rooibos. My fave is rooibos orange (just rooibos plus dried orange peel--good stuff!)

I don't know where my wife's sister gets her teas, but I do know that we've had a hard time finding the equivalent in quality here in the States.