Personally, my favorites are (In no particular order): Dragon Age, Fallout, Fallout 3, Fallout: NV, Oblivion, Morrowind, Divinity 2, Infinite Undiscovery, Blue Dragon, FF10, FF10-2, FF7, Fable, Fable 2, Zelda: TP, Zelda: OoT, Star Wars: KotOR, Rune Factory, Demon's Souls, Chrono Cross, Pokemon Emerald, Pokemon Firered, Kingdom Hearts, Breath of Fire, Legend of Dragoon, Neverwinter Nights 2, Planescape: Torment, Baldur's Gate, Mass Effect, The Witcher, Deus Ex

And when it comes out, add Skyrim to that. ^^;