I have a great love of game soundtracks; they are great as working BGM, and many of them are a wonder to listen to. I agree with you that the FF series tends to have great soundtracks - I haven't played too many games in the FF series but I've listened to many of their tracks. Persona 5's OST is one of my favourites for sure, although recently I've taken to listening to Maplestory's OST to relive my old memories 😄