What term describes a taste that is pleasantly pungent or tart and charming or attractive?

The term that describes a taste that is pleasantly pungent or tart and charming or attractive is "piquant." This word is often used to describe flavors that are spicy or tangy, providing a sense of liveliness and excitement to a dish. Foods that are considered piquant typically stimulate the palate and evoke a strong, pleasurable sensation, balancing boldness with an appealing taste.

By contrast, savory refers to a rich, full-flavored taste often associated with spices and umami, but it doesn't capture the tartness or charm implied by piquant. Flavorful indicates that a dish has a strong taste, but it lacks the specific connotation of sharpness or pungency. Bland, on the other hand, suggests a lack of flavor altogether, making it the opposite of a piquant taste. Thus, piquant is the most fitting term for the description provided.