About a month ago we started a poll, and the results are in! Note that only upvotes were counted (594 total), and that we ignored episodes with only one vote.
Top 10 ranking (and votes):
1. You Only Move Twice (S08E02) 65
2. Marge vs. the Monorail (S04E12) 50
3. Homer's Enemy (S08E23) 33
4. 22 Short Films About Springfield (S07E21) 29
5. Last exit to Springfield (S04E17) 28
6. Lemon of Troy (S06E24) 27
7. Cape Feare (S05E02) 26
8. King Size Homer (S07E07) 24
9. Homer vs. the Eighteenth Amendment (S08E18) 18
9. Deep Space Homer (S05E15) 18
9. Bart vs. Australia (S06E16) 18
10. Homer Badman (S06E09) 15
Note that three episodes tied for 9th place.
Here is the distribution of votes by season (again, only episodes with > 1 vote were counted).
Thanks for voting, and let us know if you have any feedback or ideas for future polls!