The problem with black tea is that it sure discolors the teeth; worse than coffee.
I brew my black tea in a glass French coffee press that I also use to make coffee and herbal teas. When the black tea is brewed, it sure cleans the glass of any residual coffee oils that are not easy to clean. It cuts grease as well.
I love black tea. Recently, I also like roasted green tea and green tea with roasted brown rice.