Ginger tea is better when you're feeling sick. Cinnamon tea is great if you are bloated or gassy. Green tea is supposedly good for thinning your CM if TTC. And over all, tea is just so relaxing and wonderfully tasty.
Coffee vs. Tea-(A note: The study in Denmark about stillbirths and coffee is not necessarily cause and effect- women with healthy pregnancies are usually repulsed by coffee, so drinking so much coffee can (not always, but can) be a symptom of an unhealthy pregnancy. Drinking coffee doesn't cause the stillbirth. )