Built the now-playing screen around a spinning disc with a color-shifting gradient ring that reacts to album artwork. Playlist view uses rich artwork cards instead of the standard vertical scroll list - feels more like flipping through vinyl at a record store than browsing a database. Even the mini player shows the artist's photo instead of just a text label, because why not.
Because music is personal and the UI should remind you there's a human behind the track, not just an algorithm.