My favorite episode would be the first one cause of Gir and his doom song Doom song lyircs: Doom x 120
These four, in no particular order: #20 "Tak, the Hideous New Girl" #26 "Gaz: Taster of Pork" #14 "Mysterious Mysteries" #1 "The Nightmare Begins"
The Future Dib episode. Dib is my fav. Nobody likes him - everybody likes Gir and Zim. Even Gaz. I have yet to converse with someone who really likes Dib and his big head.