Blueberries that taste the same but are transparent in the middle. Tomatoes that tase water. Cucumber that look great and almost tasteless. You don't know what you are missing if you have never tasted the "real" deal.
Especially for kids. In summer, my kids ask for a cold cucumber instead of a can of soda. I guess if the cucumber was too tasty they wouldn't really like it as much. It's "chewy water", just like watermelon but without the sweet.