Villains - I would almost say FF XV if the game was more competent about telling it's own story. Sadly it flopped so I think I have to default to FF 7. The Turks, Rufus, Sephiroth, Hojo, Shinra, etc are all very memorable and motivations are pretty clear.
Main Party Cast - I want to say FF 7 because of Barret alone. He actually gives a shit about what he's fighting for, drives a good early chunk of the story, and has genuine empathetic motivations (Marlene / Dyne / Events in North Corel). I know a lot of people had problems with the translation and just saw angry dumb black guy speaking in slang, but I think everyone forgets he was a miner in butt fuck no where till his town was burned to the ground. He probably had minimal education and his inability to express himself or convince others resulting in frustration was something I found empathetic. I also think his story obviously parallels a lot with obvious real world issues of corporate greed, environmental pollution, climate change, etc. I can connect more with those issues than something happening to a princess or something. Tifa and Aerith are also great supporting cast and Cloud does eventually develop as a character.
Music - FF 7 easily. This is the easiest pick of the list. Entire OST is #1 GOAT for video games period. Even outside of the obvious fan favourites like One Wing Angel, Aerith's Theme, Those Who Fight Further, Jenova, Turks Theme, etc the OST has range and almost all of the OST is top quality. Tracks like "Those Chosen By the Planet", "On That Day, Five Years Ago" , "Shinra Company", etc don't get talked about much but are all super iconic and carried a lot of tone / mood that the visuals at the time couldn't. There's also a ton of other classic odd tracks in there like Electric de Chocobo, Crazy Motorcycle, Hurry, etc that barely get talked about. Like 90% of this OST is S or A tier. I'd give FF8 a runner up for OST. Blue Fields, Don't Be Afraid, Force Your Way, etc are S++ tier but there's a lot of that OST that just falls flat for me. It's not as consistent as FF 7.
Setting/world - I think FF X has the best consistent world overall. The locations largely make sense and don't feel too out of place. I do love FF7 and 8 though for their weird standout locations though. Places like Midgar, Junon, Gold Saucer, D-District Prison, Esthar City, etc feel like they make no sense in the context of their worlds but they are extremely cool designs in isolation.
Story - Probably FF X again. Sin remains a clear goal for a majority of the game, Yuna's fate gives the story some character development meat to chew on, the journey also stays fairly grounded. Minus points for the Tidus laugh though...
TL;DR - Villians 7, Main Party 7, Music 7, Setting/World X, Story X
, i like zidane and lock, and tidus, i think these three are the nimble char types. 
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