In no particular order:

1. Prelude (any version though FFXII has my favorite)
2.The Rebels (FFII)
3. The Lunarians (FFIV)
4. Within the Giant (FFIV)
5.Theme of Love (FFIV)
6. Dear Friends (FFV)
7. Home Sweet Home (FFV)
8. Prologue Theme (FFV)
9. Battle on the Big Bridge (FFV)
10. Omen (FFVI)
11. Terra's Theme/Awakening (FFVI)
12. Aria di Mezzo Carratere (FFVI)
13. Epitaph (FFVI)
14. Coin Song (FFVI)
15. Shadow's Theme (FFVI)
16. Dancing Mad (FFVI)
17. Ending Theme (FFVI)
18. The Main Theme of FFVII (FFVII)
19. Lifestream (FFVII)
20. Aerith's Theme (FFVII)
21. Those Chosen By The Planet (FFVII)
22. One Winged Angel (FFVII)
23. Freya's Theme (FFIX)
24. Not Alone (FFIX)
25. Melodies of Life ~ Final Fantasy Theme~ (a.k.a. the entire closing theme to FFIX)

I'll give explanantions for each of them later, if ever...