Without LotR and GoT, we wouldn't be having a positive conversation about this. We would be saying "Please, God, don't let them ruin my favorite book!" I think most fantasy books simply have too much going on to fit into a good movie. A series, TV or movie, is different, but comes with its own challenges. It is very rare that movies/TV manage to maintain or enhance the quality of a story. Also, taking written dialogue and having people say it makes it about 1000 times more obvious that the dialogue was poorly written. Personally, I think Sanderson's novels would have a big problem with this. On screen, all of Sanderson's characters will be Anakin, Qui-Gon, or Jar Jar, and none of them will be Han or Leia. With that said, the movies/TV that I'd most like to see would be anything and everything by Abercrombie, Acts of Caine, Red Rising, any maybe a heavily reinterpreted WoT (not because I think it'd be great, just because I'd want to watch it even if it wasn't great).