1. Season 7 - I love the George/Susan arc, just so many brilliant episodes. Spongeworthy. NO SOUP FOR YOU!!!
2. Season 5 - So many classic moments. Is anyone here a marine biologist? I WAS IN THE POOL! Do women know about shrinkage?
3. Season 4 - The Jerry pilot story arc is great. But are you still master of your domain? I'M OUT! Not that there's anything wrong with that.
4. Season 8 - So many great episodes. Little kicks, bizarro Jerry and yada yada yada...
5. Season 3 - The first time we see Newman, a fantastic season overall. I think it moved. THESE PRETZELS ARE MAKING ME THIRSTY!!!
6. Season 6 - A very consistently strong season, but it doesn't seem to have as many strong/memorable episodes as S4, S5 and S7. It doesn't have as many catchphrases either.
7. Season 9 - This is still a very good season, and it's probably better than 90% of other sitcoms, but it's just "above average" by Seinfeld's standards. Festivus. SERENITY NOW!
8. Season 2 - A decent season. An improvement on the first season.
9. Season 1 - It's alright I suppose. Nothing special though, let's be honest.