What cartoon did you enjoy as a child but can't watch now because it doesn't translate well with age?
There are several for me, but the one that stands out foremost in my mind is Thundercats. As a child, I loved that cats looked like humans and were fighting against evil. They had magic powers and cool rides. I still think in theory they are cool, especially their logo, but I can't stomach the actual show. The characters are flat and stereotypes. The story lines are cut and dry; good always triumphs over evil. For a child, that's fine. They like when things are black and white, it's easier for them to understand. For an adult, I like a little more depth.