I can agree with you that they're all great. Here's how I see it:
Besides the Laguna Theme and Liberi Fatali, VIII's soundtrack was as bland as they come.
The only ones I enjoyed from X are To Zanarkand, the battle theme, and the Hymn of the Fayth.
From VI, VII and IX I enjoyed almost everything.
I haven't played IV enough to judge the soundtrack.
Quem disse que a boca é tua?
Qual é, Dadinho...?
Dadinho é o caralho! Meu nome agora é Zé Pequeno!