One Piece's anime is known for its divisive filler arcs. Most fans agree that the non-canon filler arcs detract from the main story. Some filler arcs lack compelling storytelling and character development. The Silver Mine Arc is criticized for its lack of a strong antagonist, while the Z's Ambition Arc feels dull despite some interesting elements. The Marine Rookie Arc fails to capture the charm of the G-8 Arc, and the Little East Blue Arc is subpar outside of the nostalgia it offers. The Rainbow Mist Arc's slow pacing hampers its interesting story. The Post-Alabasta Arc pales in comparison to the main story.

The Warship Island Arc contradicts One Piece canon. The Goat Island Arc is forgettable. The Caesar Retrieval and Cidre Guild Arcs have weak payoffs. The Boss Luffy Historical Specials confuse viewers. The Spa Island and Ice Hunter Arcs are criticized for being obnoxious and slow, respectively. The Ocean's Dream Arc consists of boring recaps. Foxy's Return Arc is considered the worst filler arc, failing to engage viewers or contribute to the larger One Piece story.