Yeah I heard good things about SMT4. Sounds like 4 and 5 are probably the best QOL ones. I tried out 1 and 2 on the Super Famicom and they're ROUGH. They do that super-early 3D thing where you're moving down nondescript single-color hallways one block at a time in four directions. Was hoping they'd just be normal RPGs. Nocturne also kinda sounds like a pain.
SMT4 has a killer soundtrack from what little I listened to a few years ago and it being more modern helps. Is SMT4: Apocalypse a sequel or an FES type remodel or what?
I'm not into the anime aspect of Persona and all of the high school drama because I'm not a teenager or obese, but I really like the gameplay and the equippable demons that change strengths/weaknesses and all that jazz. What I'd really like is a regular RPG that uses those mechanics, only with like, adult characters and an interesting world that can be explored. Bonus points if it isn't anime style which I know is hard to find now, even Fire Emblem traded in its tremendous art style for generic anime.