Indeed, my mom and step father are now upper middle-class. But growing up we were poorer than poor. There's plenty of good shows that I never got the chance to watch. Now that I have the opportunity to, they probably wouldn't hit as hard due to a lack of nostalgia.
Indeed, I know SpongeBob had many. That was one of the few shows that I had on DVD. Even nowadays I can watch the classics and find them often humorous. They used to sneak in plenty of dirty jokes and innuendos for the parents. Lol