The ocarina songs are all great. They're simple but still powerful (or just catchy, like with Saria's Song or the Song of Storms). My favorite is between Requiem of Spirit and Song of Time. Requiem of Spirit is a haunting melody that will cause chills, but it's so late in the game when you learn it! The Song of Time is simple, but it has a very mystical type of sound. Part of my view for this song, though, comes from all the renditions that exist. You have the actual ocarina song, then there's the Temple of Time, then you have all the orchestrated versions online. It's just a song that is very powerful.