My favorite is number 23:
Ideally, you should be able to watch each episode anew at five distinct stages in life. As a toddler, marvelling at all the bright colours; as a teenager, enjoying the tilts at authority; as a student, relishing the in-jokes and movie references; as an adult, musing on the truths about life, love and death; and in your dotage, marvelling at all the bright colours.