Dragon Age is old now, almost as old as W1 (2009). I have been steered clear of some of the DLC but the story is top-notch. If you play CRPGs at all, you really should give it a shot. I think DAO and DA2 were on GOG (for free maybe?) a few weeks ago. The newest piece of the franchise looks like it'll be hard of my video card, so it may have to wait.
I think Witcher's story is some of the best I've seen, and someone was paying attention to certain aspects of historical period (though this isn't like Assassin's Creed where that's essential). However, it has such horrifically adolescent aspects that I found it almost unplayable at first. Storytelling overcame it, but I'm in no hurry to spend my $$$ for #3. (I got the first two for $5.)