I've been a tea drinker since I was a teenager, and have only gotten more addicted to tea as time goes on. I'm currently at a couple of liters a day.
I love all styles of tea, but as I currently live in Japan I'm checking out many of the teas available here; bancha, kukicha, and houjicha to name a few. I'm also a big fan of Assam tea, and almost all herbal teas including rooibos and mate.
My favorite way to brew tea is using a brew device from Taiwan that is marketed in the US under names like IngenuiTEA, and Perfect Teamaker. The device allows ample room for your leaves and makes cleanup quick and easy. I like the brewer so much I'm actually trying to market it in Japan.