The only Simpson’s episodes I don’t like are the newer ones where they seemed to be travelling around the world. Some of the jokes were lame. But now they have gone back to normal again. It’s still very VERY funny and shits all over Family Guy. It takes a lot to come up with fresh original humour after all these seasons, but The Simpsons is still managing to make me laugh. The lastest one I saw was “Homerazzi” I think it was called. But I didn’t like how there was some kind of moral there that they wanted you to learn. Apart from that, it was brilliant. Nothing will ever top The Simpsons. Not now, not ever.
A LOT of Simpsons episodes contain a moral, a lot of them are tearjerkers and stuff, but they always manage to end up with a joke still, and eventually it is never too serious.
If they did not ever try to go deeper than just comedy, they would not have that quality. Some episodes are pure comedy, some are serious. I love the diversity, it’s got a lot of dimensions