It's funny over time how your taste buds can change. I've heard for a few years now how healthy fresh lemon in water is. In the past when I tried it, I didn't like the taste. Recently I tried it again, and really like it. I'm sure the change has to do with cutting out added sugar to my diet. As a kid, I really liked Lemon-aid, so probably when I first tried it, I was expecting it to taste more like Lemon-aid. Now, due to cutting out added sugar, I can't drink Lemon-aid, because it's too sweet.
As usual, I googled Fresh Lemon in Water, and found this! 11 Benefits of Lemon Water You Didn't Know About: