Oh man, you're going to love Persona 5! Check out the trailer here: https://www.youtube.com/watch?v=wPqSkzNNPIg The 4th one is really good too, but definitely feels graphically dated.
Thematically, Persona 4 was just so, so perfect (for me). I loved the spooky noir-ish town setting. Really looking forward to Persona 5 - it looks amazing - but from previews haven't quite got my head around the theme yet.