The music created for the Rune Factory series is truly amazing. Not so much the 'title' songs but the music that accompanies specific moments in these games. The wonderful little dance sequence at the Sainte-Coquille Park in Rune Factory 2 is one of my favourites. The Romantic Event music, what I usually call 'Heart Music' in Rune Factory 2 is another.
Rune Factory Frontier has a wealth of musical themes. The Song of Trust is one, but there are many others that deserve recognition. Kross' Theme is interesting in that it appears first in his daily conversations but then rises to new dramatic and symphonic heights in the first Confrontation with Brodik in the Green Ruins.