The Music, Job System and Omega and Shinryuu are the main reasons why I enjoyed playing it so much.

The boss battles too were much more challenging than any FF I'd played prior to V, and actually made me think about the fight and sometimes use a tactical approach to it instead of just bashing away at them until they died.

X-Death and the fact that Galuf (SPOILER)dies are the only things that disapointed me about it.