Although most of the soundtrack is pretty much "elevator music", I still thought the score worked quite well with the game, and there were some tracks I especially liked, such as:

Lots of tracks here
Loop Demo
Final Fantasy ~FFXII Version~
Opening Movie (Theme of Final Fantasy XII)
The Dalmasca Estersand
Victory Fanfare ~FFXII Version~
Theme of the Empire
Chocobo FFXII Arrange Ver. 1
Sorrow (Liberation Army Version)
State of Emergency
Upheaval (Imperial Version)
Esper Battle
Sorrow (Imperial Version)
Seeking Power
Desperate Fight
Clash on the Big Bridge ~FFXII Version~
Abandoning Power
The Phon Coast
Destiny
The Sochen Cave Palace
Esper
To the Place of the Gods
The Beginning of the End
The Sky Fortress Bahamut
The Battle for Freedom
The End of the Battle
Ending Movie
Kiss Me Good-Bye
Symphonic Poem

My favorites out of these? The first three, the last three, plus Theme of the Empire, Upheaval (Imperial Version), Esper Battle and The Battle for Freedom.