I'm a big green tea fan...I have to say, my all-time favorite is genmaicha (Japanese green tea with toasted rice and barley), which is especially good after a rough workout. Jasmine green is also very nice, and available practically everywhere. I'm also becoming quite fond of golden monkey (an oolong, I believe) since my brother sent me some looseleaf. Two others I'm just starting to get into are puerh (double-oxidized black tea...rather tanniny, but a very good complex flavor and supposed to be quite good for you) and matcha (Japanese powdered green tea, the same stuff used as the flavoring agent in good green tea ice cream).
Of course, I do not do as the heathens do and adulterate my tea with milk or sugar.