Lemon Verbena leaves dry very easily, keeping their flavour and make a wonderful tea with good colour, best served hot I think.
Cinnamon Basil makes a delicious sweet tea, possibly best as ice tea. Leaves should be left to steep for as long as possible (keep covered).
Rooibos is my favourite bought tea, good hot or cold, with or without milk. It is very satisfying in spite of no caffeine.