I dont think anyone mentioned " Final Battle ", its Necron's battle theme. I like all the songs in the game! But some of my faves are ( in no particular order ):

Messenger of Ruin - Kuja Trance's awesome battle theme!
Branbul the souless village - this song is kinda sad, but I like...
Frontier village Dali - It feels catchy and relaxing at the same time.
Final Battle - Necron's psycho battle theme is tight!
Roses of May
Overworld theme
You are not alone

There are too many others to list. FF9 sports one of the best soundtracks in game history ( i think at least ), and I like every track.

I also have a awesome remix of " You are not alone " being played with guitars and a nokia cellphone. That is an awesome mix.

How many people own FF soundracks? WHich ones? I have FF8's soundtrack and FF9 piano collections, I'm just curious...