I'm currently playing Kingdom Hearts: Final Mix on the PS4.
As far as Remasters go, the Kingdom Hearts series are some of the best I've ever experienced! They look stunning on PS3 & PS4 and finally make the series accessible again! - From having the series diverge into portable consoles, plaing Birth By Sleep on PS4 is a wonderful thing!
I just beat Atlantica, which I really enjoyed despite the underwate criticism. It was fulfilling to beat Ursula as I struggled at first, noted she was spamming Thunder magic, so I changed all my accessories to reduce Thunder damage and demolished her! It's so satifsying to see the effects of the right set up work in an Action based JRPG like this.
I'm plowing through the series with Chain of Memories, II: Final Mix & Dream Drop Distance to play - DDD Which I have never before, so excited by that! Of course leading up to Kingdom Hearts III Early 2019. Just having so much fund re-playing them, I did all the extras in BBS (Well on Aqua's campaign) & fully intend to do the extras on the other games too - I've never playedt he Final Mix content on Kingdom Hearts II before so excited for that too!