At our house we drink a lot of herbal tea, since proper tea is theft.
Actually it is because my mother is very picky about what she drinks. She hates the taste of plain water, is very sensitive to caffeine, and is diabetic so she can't drink things with sugar except when hypoglycemic.
She always insists that we always have a pitcher full of her favorite Celestial Seasoning Lemon Zinger Herbal Tea.
http://www.celestialseasonings.com/products/herbal/lemon-zinger-herbal-tea
Mom used to prefer their Decaf Mint Green Tea (containing decaffeinated green tea, decaffeinated white tea, spearmint, peppermint, natural mint flavor and vitamin C), but they stopped selling it in stores around here. We have a bunch of it now as I found it on Amazon, but in the meantime we tried out several other varieties that were locally available. For a while her new favorite was their Peppermint Tea (which contains nothing but peppermint leaves), but then she settled on her preference for their Lemon Zinger (made from Hibiscus, rosehips, roasted chicory, orange peel, lemongrass, lemon peel and whole dried lemons, natural lemon flavor with other natural flavors and citric acid.)
I like to mix things up and make different flavor teas different days, but mom always says that she wants the Lemon Zinger.
She likes it brewed rather weak and with way too much artificial sweetener. If I leave it up to her entirely she uses 4 tea bags and more than half a gallon of Spenda for one gallon of water. I can get her to accept 6 or 7 tea bags and 4 cups of Spenda per gallon, but if we use any less sweeter than that she will pour half a bag of Spenda into the pitcher when we aren't looking.
Dad likes to mix mom's tea with his coffee as he considers it to sweet to drink on its own.
My favorite tea would either be Indian Chai or Thai Iced Tea, but I don't have them nearly as often.