I'm currently playing Persona 4 over the last few days.
I've done the first three dungeons so far, the plot might surprisingly be more interesting than Persona 5 (which had a really fun plot itself) the cast is mostly good (I do feel like Yukiko has been dropped since completing her Dungeon though) but I really like Yousuke & Kanji as characters, and Chie is displaying the best personality of the girls so far imo, even if her voice is unique sometimes.
And the gameplay is not as in depth as Persona 5 imo, but it's opening up more and more which is good, and the battle system as usual for the SMT/Persona franchise has the right level of challenge without being like the Souls Games, or being in baby mode on the other spectrum of difficulty.