Jason, the blogger at 2BASNOB, is a man after my own heart. He started to learn a little bit about coffee, became increasingly interested in the finer points, and then unable to enjoy bad coffee. He has since become a snob (could we agree to say "enthusiast" instead?) of tea, beer, and wine as well.
What does this have to do with geography? Everything.
For all of these beverages -- and most foods -- the quality of the end product is improved if the people involved and the land and water they use are treated well. Moreover, at least for these beverages, geographic differences in soil, climate, and processing traditions contribute to great variety in the cup or bottle.
The 2BASNOB blog is a very nicely organized site that provides a very rich introduction to the four beverages mentioned above. I will be consulting it as I work on my new book about tea!