Worst recent seasons I've seen: 36 and 37. Between the "Healthy Habits" preachiness and the otherwise uninspired new material ("It's Time to Play", ugh!)...those two deserve to be locked away where no one can watch them again.
That was the main problem with the health habits. They tried them way too hard, and they ended up nagging half the time. And a lot of the stuff incorporated to educate about fruits and vegitables was terrible. Do the Veggie/Fruit dance made no sense, was poorly done, and had nothing to do with vegitables or fruits. Plus, it sounded like something I could write in 2 minutes, and I'm not musically inclined.
The Fruit and Veggie songs were hit or miss. The ones Jerry nelson performed were pretty good. But that grape chant sounded weak, and nothing like a sports chant that it was meant to be.
However, I liked what they tried to do with Dinner theater.