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Man I remember this game. It was free for a month, or something? Then I switched to Knight Online (which was 'free' and terrible).
Single-player, the Knights of the Old Republic games, maybe Fable: The Lost Chapters on PC? Torchlight has more of a World of Warcraft/Diablo vibe, but it's fun too. Never played Dragon Age or The Witcher but they look similar and a bit more open.
Even newer is that Divinity: Original Sin but I think it's more of an isometric, Baldur's Gate type game, just in true 3D.