I actually thought pretty hard about this...
10. Ice Cavern - Zora's Domain was originally going to be here, but hearing this piece... There's just something alluring and mysterious about it. It also captures the ice theme very well.
9. Serenade of Water - Honestly idk I just like it.
8. Final Battle - An epic theme for an epic climax. It really gives you the feeling that, at this moment, everything is on the line. Truly phenomenal.
7. Water Temple - An ambient theme for a possibly painful dungeon. Even after hours of cluelessly walking around in circles, it doesn't get irritating.
6. Gerudo Valley - Explanation not needed.
5. Hyrule Field - What can I say? It's adventurous, nostalgic, and fun. It doesn't try to be super epic, but at the same time it's not super boring. A perfect theme for the central area of the game.
4. Sheik's Theme - Tranquil and soothing. It makes you feel like you're talking to a good friend, although Sheik is more of a mysterious aid to Link than a friend.
3. Spirit Temple - Cryptic as all hell. I also adore pretty much anything ancient Egyptian-inspired, so points for that.
2. Song of Storms - Yee
1. Forest Temple - This theme is absolutely perfect. From every ambient chant to the next, this atmosphere-packed piece without a doubt sets the tone for a dungeon full of mysteries.