The order I played in is kinda goofy. But I started with Persona 5 on Ps4 and got past the first dungeon before my ps4 died.
I gave up on Persona 5 but when smt iii came to the switch I thought I’d give it a try and I fell in love with it. Became a huge smt fan with my favorite probably being IV or then first Devil survivor. Currently playing P4G on my Vita.
Persona 5 was my first, it was interesting enough that it motivated me to find and play Persona 1, P2, P3G, P4 in that order. I wanted to experience the progression as the series broke off from Megaten, it was pretty interesting.
I still need to finish SMT: Nocturne though… lost steam after 10 hours in, not sure why. And SMT V has been great, but wanted to finish Nocturne first xD