Actually, it was the first three. Up to five was "okay", and up to eight there were a few good episodes here and there.
Wha? Season 3 to 8 were definitely the high point, 1-2 and 9-10 were okay, and everthing afterwards was terrible.
I thought the rule was "Obviously everyone's opinion is subjective but why would you even watch any thing produced after like 2000" but then I was too young for the Simpsons when it was any good.
You can always tell the real fans of any show because of how much they hate it.
the first season was in 1988.