I have compiled a list of the first 10 filler arcs (arc = story of or more 3 eps). I'd have done all of them but I can only do 10 with the poll system so deal with it. I left out Menma, the amnesiac savior, the Shinobazu (giant prisoner guy) and the final arc with Garaa, though there was some sentiment on IRC that this was pretty hate-able because of what they did to Garaa's character.
Now remember this thread is all about what filler you liked THE LEAST. If you liked them all, or if you don't really care, go away.
Description of the Arcs:
1. Infiltrating Orochimaru's Lair: Episodes 136–141: This arc covers Jiraiya, Naruto and Sakura following up on a lead in an attempt to rescue Sasuke, which points to what is Orochimaru's former lair.
2. Mizuki Strikes Back: Episodes 142–147: This arc covers the return of Mizuki — a minor villain from the first episode — who is after Iruka and Naruto, who originally defeated him and foiled his plan to steal a crucial scroll from the village.
3. Bikōchū: Episodes 148–151: This arc covers a joint quest of Naruto and Team Kurenai in search of a legendary scent bug which should be able to locate Sasuke by the faintest scent he left behind. However, there are others after the bug, too. (Hinata gets her new powers here).
4. Raiga: Episodes 152–157: This arc covers a mission Naruto and Team Guy go onto in an attempt to capture the maniac Raiga, a former member of the Seven Swordsmen of the Mist, who is terrorizing a small village and might have information on Akatsuki member Kisame Hoshigaki, and save the village that Raiga took over.
5. Bird Country: Episodes 162–167: This arc covers a trip to the Bird Country. Naruto, Neji and Tenten must solve the mystery of the ghost of Noroimusha. They soon get involved in Bird Country's inner conflicts.
6. Sea Country: Episodes 169–173: Naruto, Ino Yamanaka, and Shino Aburame, led by Anko Mitarashi, go to the Sea Country to defeat what is said to be a sea monster. There, Anko gets the chance to regain the memories she lost when she was Orochimaru's student. Also has a brief Sasuke cameo.
7. Hidden Star Village: Episodes 178–183: Naruto rejoins Team Guy on a mission to Hoshigakure to guard a special meteorite with a mysterious power. Here he meets Sumaru, a boy who, like Naruto, is determined to become a Kage. However, many problems and secrets lie within the Hidden Star Village.
8. Konoha Moving Center: Episodes 187–191: A request comes from the lord of the Land of Vegetables to escort a group of peddlers. Naruto, Chōji, and Hinata are forced to team up and join the peddlers on their journey, and later on they are attacked by three mysterious jōnin ninja.
9. The Konoha 11: Episodes 197–201: An old carpenter named Gennou steals plans for important facilities in Konoha. Worried that he may be allied with someone planning on invading Konoha, Tsunade appoints Shikamaru as the leader of the ten prominent Genin to investigate the situation.
10. Kurama Clan: Episodes 203–207: Kurenai quits as Team 8 leader to take care of some old business with a former pupil.
Dishonorable Mentions:
1. Shinobazu: Episodes 209–212: Naruto, Lee, and Sakura oversee the transfer of a member of "Shinobazu" – a group of rogue ninja who commit crimes for a living – to a prison.
2. Menma: Episodes 213–215: Naruto finds a strange boy with amnesia and a special ocarina. Since he can't remember his name, Naruto calls him Menma. Naruto tries to help him regain his memories. (This arc was my favorite actually...the dude dies at the end!!!!!).
3. Shiitenshounin: Episodes 216–220: Ninja candidate Matsuri is kidnapped from Sunagakure. A mysterious group calling themsleves the 'Shiitenshounin' (lit. 'Four Heavenly Directions People') sends Gaara a challenge. The Konoha Eleven (Tenten excluded) are sent to aid the Sunagakure ninja in debt to their aid in the Sasuke Retrieval arc. Shikamaru divides the group into two teams: Naruto, Shikamaru, Choji, Ino, Kiba, and Lee as the main force and Sakura, Neji, Hinata, and Shino as medical support and scouts.