I also enjoy Green tea but am usually too lazy to make it myself and only do so occassionally. I usually drink it after smoking a couple bowls because I find it to enhance the taste and have never noted it ruining my high, the slight amount of caffeine may even potentiate it.
It is high in anti-oxidants and studies have shown that tobacco smokers who consume 6 cups of green tea daily have a 50% less risk of getting lung cancer.
http://www.harvestfields.netfirms.co...ung_cancer.htm
http://www.newstarget.com/000375.html