Simpsons

THE SIMPSONS is my absolute favourite show of all time. It has been running for 26 sessions now  and its still running strong, you may ask how? Well every episode has its own unique story, all the characters are unique apart from  the horror show spin offs etc... They also invented the couch gag, the couch gag lets them play around with how long they want their actual animation to be, very clever indeed.
The shows are all  full of jokes for kids and for adults, this broadens their target market.
They also have a  dedicated work force, people that  work on the episodes almost every day. This helps them to keep the viewers happy by turning out tons of episodes, they try to create at least 4 episodes at once, they can take up for 6 Months just for one episode.... imagine having to wait 6 months for every episode... well that would suck.