I like BG3's leitmotif. Leitmotifs were a very common thing in 90s and 2000s era rpgs. Baldur's Gate 1 did it for example with how its main menu theme has a leitmotif that is repeated throughout the game in different contexts.
For example the theme song for the fight against Sarevok closely mirrors the main menu theme. However it has a more dour and horror tone as exemplified by Sarevok's line "Face me! Face the new lord of murder".
