For mainline SMT games, here are my favorites.
>1. Nocturne
The Law vs Chaos dichotomy in other SMT games never appealed to me as much as the Reason vs Reason moral grayness that Nocturne employed. It was less about siding with (((Lucifer's))) or (((YHVH's))) vision of how the world should be, & more about which philosophy would you personally deem best for the new world order. Not simply locking you into another game with the same old SMT "complete freedom is chaotic and bad" vs "complete order is strict and unfree" storyline, but by giving you more varied philosophies this time around.
Like "complete darwinism where the strong must reign and the weak must die", versus
"complete isolationism where everyone is separated into their own ideal world", versus
"complete neutrality where stopping time completely means that neither bad or good actions can occur".
These Reasons are still extreme and absolutist in their approaches, but they were a nice change of pace from the usual Law vs Chaos extremism of other SMT games.
It also had the best Lucifer boss fight of the entire series. Thanks to how the story built him up + traveling through an unfair Hell (Labyrinth of Amala) for the right to face him, it did feel like the most realistic interpretation of the Devil this series has ever come close to replicating.
2. Apocalypse
Before you faggots complain, let me explain. I don't think that the friendships themes in this game are very "SMT-like" imo. In most SMT games, your friends and allies usually start off on good terms with each other. But eventually as the story progresses, they will become bitter enemies who are driven apart because their differing philosophies (Law diehard supporters, Chaos diehard supporters) prove too incompatible with one another. In Apocalypse, the reverse happens. Your teammates start off as hating each other, but because Friendship is Magic™, become all buddy buddy towards the end. Atypical of how SMT stories and characters usually play out.
That said, I still think this game has the best YHVH fight of the entire series. Rather than simply fighting him through brute force alone, the game's writers were clever on how to accurately defeat an almighty god. You have to systematically debunk his entire religion and teachings to cause him any harm. If he no longer believes himself to be omnipotent, his own doubt leaves him vulnerable to pain afterwards. Very clever.
It's here where the friendship themes come into play and their inclusion finally make sense. These unlikely companions of yours grew together as a group and eventually formed strong bonds with each other. Their arcs in the game's story not only served to watch them become friendlier personalities, but when it came time to debunk YHVH's points one by one, their words and deconstructions actually had weight behind them. Powered by their own personal arcs within the game's story that served as a prime example as to why YHVH's teachings are proven utterly wrong.
3. SMT4
Basically a modern reimagining of SMT1. Complete with the quintessential Law vs Chaos storyline that SMT is known for, where the clearly Chaos ally (Walter) and clearly Law ally (Jonathon) transform into diehard supporters of their own alignment. Out of all the mainline games, I think that this one did the Law vs Chaos story the best, simply because Walter and Jonathon perfectly embody those two sides.
SMT4 might not have had a good final boss. Nothing like Nocturne's Lucifer or Apocalypse's YHVH, but as stated above, it did have two of the best Law/Chaos human characters this series has ever seen. Quite possibly The best portrayals of those alignments.
>4. Everything else (SMT1, SMT2, Strange Journey, if…)
I despise first person dungeon crawlers. That boxlike maze of traveling is just horseshit and not fun. This is mainly why I prefer the 3D movement of Nocturne, SMT4, and Apocalypse.
In addition to this, I also prefer games like SMT4/Apocalypse, later Persona games, and Chrono Trigger that let you see an enemy outside of battle before you fight them. I like having the option to avoid battles if I can successfully avoid contacting enemies outside of battle. Games where you walk around on empty floors and still trigger unnecessary battles like in Nocturne and Final Fantasy X can get annoying after a while. Not every weakling is worth fighting for chump exp.
If SMT5 comes out with 3D movement and overworld enemies, I would definitely play it and not throw it in the trash like I do with worthless first person dungeon crawlers.
But despite me liking how SMT4/Apocalypse handled the way you initiate battles, I would still prefer to play Nocturne over either of them. Simply because its atmosphere, story, and overall experience were just that good.
But to be frank, Nocturne is the only good one I would replay out of the Main SMT games. The rest were just one and done experiences for me.