I drink green tea all day everyday. Sometimes I'll add ginseng, honey or mint. When I make black tea I prefer it to be sun brewed. I've been known to add absolutely anything to black tea: lemon, raspberry, orange, honey, cinnamon, the possibilities are endless.
Chamomile tea with honey is the best when you're sick.
My favorite has to be either an iced green tea with honey or a hot black tea with lemon.