Which has nothing to do with joke quality. For me, I think it was season 5. They were still a little rough around the edges compared to today's toons (Did they still only have 1/2 the frames at this point?), but they had mastered most of the basics. My favorite animation example is 1F16, Burns' Heir, because of the beginning Industrial Chimney Sweep For A Day bit. I wish they animated the recent shows like that. Anyone else?
BTW, anyone who says Tracy Ulman will be shot.