I am an avid tea person and drink tea every day. In the summer I tend to drink more black teas and in the winter, more green or oolong. My old standbys are Earl Grey and Keemun in the morning. For greens, I like sencha, hojicha, and genmaicha. I also make huge batches of iced tea with peach tea, lychee tea, etc. in the summer. I have about a dozen different kinds for various moods.
I order my tea in bulk at uptontea.com who has a huge catalog of all kinds of tea. Ten Ren is a good source for Chinese teas. Some teas can be very pricey per pound, but you only use a teaspoon per cup of tea, which weighs only a few grams so it doesn't cost much per cup.