With so many teas to choose from, it's difficult to name just one favorite. I also enjoy discovering new teas, too.
If I had to choose one, I'd probably have to say English Breakfast Tea (or Irish Breakfast Tea) for the all around standard. Darjeeling runs a close second.
Earl Grey is nice for a change, but usually not for breakfast. It's a nice afternoon refresher.
If I'm in the mood for a tea without caffeine, I can find a wide range of herb teas to choose from. Something with raspberry in it is always nice.
Let's hear about your favorite(s).