The first PS game I played was IV. My brother whom was 12 years older than me (I was 4 or 5) apparently was up on the great games, so he owned PS2 and then bought PS4 when it first came out. After he beat it, he gave it to me. It was my first RPG, and I've been a huge RPG fan since. Although I was 5 or 6, I beat this game, I'll admit I powerleveled but still not bad for a kid just starting elementary.
Speaking of which, it's funny that I first started elementary when I first got PS4, but now that I'm graduating High School (my last day of High School was yesterday) I decided to do a playthrough of all the games in order, then do the sidequests. I'm currently on PS4 (Purgatory Mod, and regular)
Since then I've played PS4 countless times, PS1 1 1/2, PS2 3 times, and PS3 1 time.
This is my favorite series