[2] "Favourite" was debuted live on 8 May 2024 at a surprise show in New York City's Warsaw club, marking the first show of the Romance era in a sold-out crowd of 1,000 people that included Alex Turner of Arctic Monkeys.

[4] The track originated from a chord progression that guitarist Carlos O'Connell played to Chatten in 2022 while the band was recording their previous album, Skinty Fia.

Guitarist Conor Curley said, "I think Grian was on a spark once he had the 'Favourite' motif that he had so many different angles to write so many verses.

[10][11] Curley said about the comparisons, "Shredding is obviously such an amazing thing to be able to do on a guitar, but when you can really write a feeling with a melody, like Johnny Marr did so well – that’s the goal.

[14] The video for the song was filmed in Madrid, where the band's guitarist Carlos O'Connell was born and raised.