You’ve been cursed. Water will still be water, but it will never taste anything like water again for as long as you live. But, you get to choose the flavor, as long as it’s nothing that already tastes close to water, like tonic or water with lemon.
It could be a plus, but if you choose something too out there, you could get sick of it. For instance, who wants a cold glass of whisky after a 5k? It wouldn’t have any effects of booze, just the taste. Ditto for cooking. If you make soup with water, it’ll taste like soup made with Gatorade (or whatever) to you, but fine for everyone else. Though I guess you could use stock.