Really tough to pick just one...Path to Ascension, Dan of 1,000 suns, Serenade of Respite, Teaks, the Travelling Historian, all the messenger tracks, Sky base....I'm missing multiple in that list and all of those are in the running for 1st. Best OST of the year if not past 5 years honestly. It's competing with Undertale in my favorites list...UNDERTALE!!! Amazing soundtrack.