Tea is nice to drink when I want something hot, like when I'm sick or in winter. Other than that, it doesn't really do anything for me, I don't feel any different after drinking tea than after let's say water. Coffee is a completely different story. I love the taste of it, whether black or with milk, sweetened or not. It doesn't really wake me up, or energize me, more like it makes me shaky in a good way. Doing pretty much anything after drinking coffee is much more enjoyable - games, animu, even work.