"Myths & Legends" covers a broad range of musical styles, as The Aquabats had stated they wanted to explore more diverse musical textures after predominantly showcasing ska music on their first two albums. Much like "Floating Eye", most of the tracks on "Myths" draw heavily upon punk rock and new wave-influenced sounds, with a pronounced usage of keyboards and synthesizers. The compilation also includes songs in synthpop ("Worms Make Dirt"), ska punk ("Pizza Day") and jazz ("Radiation Song") styles, as well as a parody of nu metal bands such as Korn and Limp Bizkit ("I Fell Asleep on My Arm").