Ugh, I really wish I liked The Witcher series. TW3 sounds so good. ;_;
In so many ways, I still kinda don't, and TW3 is really, really good. The setting has about an inch of depth, and it generally falls short in all the aspects of world building and lore coherence that Bioware really shines, but the characters and story are generally good. Geralt was a pleasant surprise, even if witchers are basically Wolverine Jedi James Bonds. End of the day, it's all so goddamn well-executed - like, I mean, perfectly executed, they made very, very few missteps - that it all works out. The design of the world really is a triumph. It's worth playing, certainly, though I'd recommend maybe not starting at the first game like I did. Reason being that the first game is one of the worst games that anyone's ever made. I didn't read the novels, either - there's plenty of background available in the game itself.
The Witcher series is easy to get into. Each game tells it's own story, I went from Witcher 2 to Witcher 1 but Witcher 1 is better in many ways. CDPR really pulled a Mass Effect 2 with Witcher 2.
You just have to trudge through it's horrific combat and hope that you might like some of it's characters and not get annoyed by how the series uses sex because at times it is laughable or corny. Gotta catch all those sex cards.
Also, the series isn't as hardcore as the devs want to make you believe. They were stupid for having this poor design in TW2 of not being able to drink a potion when you wanted to.
None of the games are really as game-changing as so many people seem to think, except for maybe TW3, but that's due to it just being really, really well-designed. TW2 had its neatly diverging second act, which was pretty cool. TW1 had the best dice poker to recommend it.... and that's it. I really don't think it has any redeeming qualities beyond that.
All that being said, I don't know what Bioware's takeaway from TW3 should be other than "make a good game" or "don't have boring sidequests" - which I don't think they need to be told, they know how to do it. Otherwise, we get into stuff TW does that I hope Bioware never does - like hop on the set protagonist bandwagon, ick. Hopefully though, MEA won't be subject to the weird things (engine change, old gen codevelopment) that inevitably resulted in the end product DAI being so uneven.