I do drink juice. I add a little water to it, but find that any more than a little (about one part water to five or six parts juice) drops it below a relevant threshold of pleasantness. I realize it is not a health drink, but I really hate water, and I do need some liquid intake. (With meals, it's (skim) milk.)

Juice selection may make a difference to the desirable dilution ratio. A little lemon or lime goes a long way!