Don't get too confused here. The different types of teas are only marginally different as far as caffeine and antioxidant content. You'd do best getting a variety, and settling on what you like best. You'll get more benefit from a tea you like that may or may not be the most healthy or caffinated since you'll be drinking more of it, as opposed to one you don't like so much that you are only forcing down because it is good for you. My personal favorite is Ti Guan Yin (Iron Goddess of Mercy) Oolong tea. I could drink it all day. Also, Red Bush aka Rooibos is NOT tea, it is a tisane. Not only does it contain no caffeine, it is a mild nerve relaxer and could put you to sleep or make you groggy (but it does have 2 to 4 times as many antioxidants as green tea). I love drinking rooibos before bed. The only carved in stone advice I can give you is NEVER buy bagged tea! It is the crap they sweep off the floor and sell to the U.S. while preparing the 'good' tea for other countries. A big reason tea has taken so long to catch on here, we get the lowest grade dust available while the rest of the world enjoys loose leaf tea.
