According to a research, black tea gives you more "throb" than green tea. Did you know that? Or have you felt that? It says that black tea, especially its aroma, brings more the sense of tokimeki, which means throbs of joy or heart pounding with happiness. That's interesting. Enjoy "black" tea together with the one you like, and the bonds between you can grow much stronger.
BTW…when you want to calm down, I think green tea might help you. Every tea has their own job, doesn't it?