Final Fantasy XIII, I know it didnt get quite as good reviews as it could have, but still a good game in my opinion. It's on xbox and PS3. about 40 hrs for main story and to fully complete the game, it could offer you a whopping 120 hours! And since you have a PS3, try checking out Final Fantasy VII on PSN. It's an old ps1 game. WHen it came out, it blew away everything gaming and really brought the RPG world to light to all those who normally didnt even play RPG's. Since you said old or new, Im sure you won't mind the poor graphics (Which were great for its time of 1997). Awesome game and you have to check it out. Since you seem to be a true RPG fan, you have to appreciate story over graphics which I am sure you do. These two selections are Japanese RPG's to be specific because they follow a different set of rules on how an RPG should be made. I think overall (with the exception of Fallout and Skyrim, btw, play fallout 3 if u havent) JRPG's are better than thes Western RPG's. I think FFVII is only $10 on PSN. Adn that game alone gives you 50 hrs main story and easily over 100 hrs to completely demolish the game. Possibly more if you're into lv 100ing. Definitely a must-try for any RPG fan. I recommend Final Fantasy VII over 13. And you don't need to play the previous ones. Each one has a totally different story. They are not sequels (Thank God, could you imagine a 13 part story).

OH, and also, Final Fantasy X, another legendary game that made its appearance on the PS2 as the first PS2 Final Fantasy game for the system. But wait until December 31st when they release an HD remastered version.