Of all the RPGs so far I played, I noticed someone mention about .Hack series. Never did like the old version of .Hack but I seriously love playing .Hack// G.U series. One of a must play RPG of Playstation 2.
Xenosaga was my second favorite when I first purchased my console from my boss (yes I'm working in a console gaming shop), I got hooked up with the game. Not to say its the best RPGs out there but a decent one for me. Favorite Xenosaga series was the 3rd Episode so far.
Next up, Tales of Abyss & Tales of Legendia. Believe it or not, Tales of Abyss was my first Tales game follow up with Tales of Legendia. I just love the story.
Final Fantasy X and X-2 wasn't what I had expected like back then in Playstation 1 like Final Fantasy VI, VII & IX but it was okay for me but I'm pretty sure you played it.
Magna Carta, no comment on this one as I did play the game and stopped after an hour or more. Never did play it throughout the whole story to see how it goes.
I'm surprise no one mentioned Valkyrie Profile: Silmeria. For Playstation 2, the graphic was pretty good for my own opinion as well with the battle system though slightly different from the Playstation 1 version.
Shin Megami Tensei series was good especially Persona 3 which I'm pretty sure most people agree with me.
Wild Arms series never did caught my attention except the remake of the Wild Arms 1 aka Wild Arms Alter F. Worth playing.
Suikoden series has really gone down the drain with the 4th series but nevertheless the 3rd one is my favorite Suikoden series for the Playstation 2 as well as the 5th one (Reminds me of the Playstation 1 Suikoden series battle system).