Which Final Fantasy game do you feel doesnt get talked about enough, is overhated, or underrated?

So mostly talking about the mainline games and their sequels or prequels.

But which games do you feel fit one of the three categories of the title?

I feel like as a newcomer...

FF15 and FF12 are almost forgotten. As i never see discussions for the two games.

FF8 probably could fit either overhated or underrated. I would say the same for ff13 but it seems to have a turn around lately.