While technically not actual tea, I love nettle tea. Especially if it's home-made. As in, going outside, running around for half an eternity in order to find the "perfect" nettles, risking my hands while harvesting leaves, and getting to enjoy the nice aroma they give off while they're drying. The whole process is just so satisfying and enjoyable.
The leaves also taste great once you're done with them for the tea, which is also a nice plus.
Annoyingly, for various reasons, it's pretty hard for me to find "tea-grade" nettles these days, so I usually have to settle for green tea instead. Nothing too bad with that, but still...