I have a couple, sadly. I'm more into the Japanese Role-Playing Game genre, such as Final Fantasy and Kingdom Hearts but my ultimate favourite of a JRPG would have to be Odin Sphere. I seriously love that game to death! I don't care if the graphics are in 2D, but the storyline is pretty good and the battle system and health system is awesome. The only downside is that I am only able to play it when I manage to hire it out from the nearby Blockbuster, but recently (for a few months now) my PS2 hasn't been able to read discs due to the pedestal for the disks not spinning, and my PS2 is the kind that has the pop up lid for where the CDs go.
On the genre of the more normal Role-Playing Games, I am tied between The Elder Scrolls Oblivion and Neverwinter Nights 2. The main reason for loving TES Oblivion would have to be its great modability and also its engaging storyline and its great potential of not having to follow the storyline. I have the Game of the Year Edition for the PC (The Console Versions can not be modded because they don't have the construction set, and the only mods for the Console Versions are the damned Official Plug-ins) which gives me the Shivering Isles Expansion as well as The Knights of the Nine. My character is a Ser'Cuine, a custom race added by a mod. Basically they are the result of the breeding of the human races with the Khajitt and I play with a kind of Samurai character in mine, as I mainly use a 2 handed version of Masamune added by a small mod or katanas added by the Snow Dragon Temple or Rise of a Samurai mods.
The main reason I love Neverwinter Nights 2 is its beautiful background story and such, as well as the graphics and animations for the different skills. The only one downside is that there is no Shifter Prestige class with it, but I don't have any expansions for it since the nearby EB Games only sells Storm of Zehir and not Mask of the Betrayer. In any case, the game allows you to play as a character of any of the 9 alignments of Lawful Good, Lawful Neutral, Lawful Evil, Neutral Good, True Neutral, Neutral Evil, Chaotic Good, Chaotic Neutral or Chaotic Evil. I absolutely love the graphics for the use of the Turn Undead ability of the Cleric and the Paladin classes, as well as a few other spells or skills.
So please tell me, what is your favourite Role-Playing Game or Japanese Role-Playing Game.