I don't consider IX underrated. It got praised by both fans & critics, and it's a constant favorite when asked about the best FF game. This thread is a good example.
My vote goes to XII. It got a lot of criticism from fans because it was different, but it's actually one of the best in the series. Solid writing, good characters/story, great customization and it offers a huge amount of optional content. Pacing & grinding were its flaws. V is probably my second choice; it has the best job system in the series.









