my list will probably go like this:
1)Saria's Song 2)Epona's Song 3)Song of Storms 4)Serenade of Water 5)Gerudo Valley 6)Forest Temple 7)Boss Music 8)Requiem of Spirit 9)Zelda's Lullaby 10)Hyrule Plains
Shadow Temple was always my fav. Sounds so creepy.
I prefer the Spirit Temple and the Ganons Castle also. Speak about Ganons Castle, i like the theme in the tower, Ganondorf's theme. A typical song for the evil persona's.