I probably didn't pick up on Seinfeld until the third season. But I'm glad I did. Much like the Simpsons, I memorized every line, and I can apply most situations and quotations to real-world scenarios and conversations. My parents even connected with it, as my mom thought Jerry and Elaine's visit to Jerry's parents in Florida reminded her of visiting her own in-laws.
Seinfeld peaked at the right time for me, and it ended at the right time. After so many seasons, the quality decreases. Seinfeld ended in 1998 after a solid nine-season run. The cast and creators made the right decision.