P3FES, if that counts. I think in Japan they didn't use SMT in the game's title.
For SMT proper, it was SMTIV, but that one couldn'tn hold my attention for very long. I really like the atmosphere in it, but I wasn't a fan how the demon negotiations worked, and I felt like the dungeon crawling would be so much better on a bigger screen and better camera. Might give the main series a second chance with SMTV or Nocturne remaster, though.