I LOVE The Witcher 3. It's hands-down my favorite game on the PS4. It was a huge inspiration for a lot of the details of Primordia, especially the Adventurers' Guild.
I was excited when I heard about this show, but I'm super-stoked now that I've seen the casting. Also, the author of the books is involved, and it sounds like the show will be based more on the books than the games, which I think is awesome. I'm hoping to read the books soon. I've heard they're really good.
Some highlights from the casting:
Nikolaj Coster-Waldau (from Game of Thrones) as Geralt
Katheryn Winnick (from Vikings) as Keira
Gemma Arterton as Triss
Eva Green as Yennefer
IMDBCasting