I know very little of varietals and all that, but I *love* trying new types of teas, especially in the winter, and my wife just bought me a new traditional cast-iron set that Ive been using unrelentlessly the last couple weeks.
I keep on hand a bag of loose-leaf Lu Cha Green Tea, a bag of loose leaf Pu Erh, and a bag of Wu Long Cha Oolong tea. I also occasionally enjoy grabbing a few grams of good Bo He (Field Mint) and making some tea with that. Its come quite handy during periods when my wife feels sick and feverish--releases the heat almost instantly...
A friend and student purchased a bag of Green Tea Chai for me while he was in hawaii. While I enjoy the spiciness of Chai, I find it is much more balanced with the addition of milk...
I agree sugar is no good, but I do enjoy some good wildflower honey in certain teas.