My favorite is Stash peppermint tea. I could drink gallons of that stuff. I also am a fan of a tea made my Celestial Seasonings called "Misty Jasmine" but I haven't been able to find it lately. I am not sure they are still making it.

I also really like a lot of the teas from Mighty Leaf tea. One tea bag of theirs will last me all morning, but they also have a large variety of loose teas.