Tea is a nice alternative to water, and I say this as someone who doesn't like most drinks other than water.

There's a huge variety of tastes among green teas, white teas, oolong, black teas... Specific tea variety, different locations where the plants are grown, different manipulations, all concur to a lot of different tastes. However, a lot of people I've met just say it tastes like "earthy/dirty water"