I prefer the one where Lisa goes to school.

One of the best ones for me was the Funzo episode.

Bart: "Alrite Funzo, you rock!"
Funzo: "Alrighty!"*does a dance*

And later when they through him on the fire:
"Im very mad at boo"

I like the one whe they shoot a roket at the comet

mayor Qimby shouts COMET and Bart catches whats left of the Bart Simpson comet

I like the one with the free tampoline!

Although i think that the new episode this sunday will rock!

the one where homer and marge's sex life is getting dull and they try it outside!

the scene where homer is hanging naked from the hot air balloon and is being dragged along the glass roof of the church is totally hilarious

there are too many to choose a best one

the one wen they go to the beach and lisa makes some friends and bart dnt (they take milhouse i think)