I name Bendin' in the Wind and Leela of Her Own for the reasons already listed.
Also, I, Roommate. On hindsight, it fits in snugly with the rest of the series, but in Season 1, it was very low key compared to the epic, lasers and chases, daring escapes formula of most of the other eps. Mars University and The Honking I didn't like, the writing was just kind of second rate for Futurama.
Futurestock was out of place too, but it was one of favorites of Season 3. It was like the Dilbert TV show, if it had been good. And, you know, set 1000 years in the future. With different characters.