There's a lot of obvious bias here, but all of the talking ends up being surprisingly important for one reason or another. There's really not much filler dialogue, unlike a lot of shows I've seen. It's just all disguised as filler dialogue at first! It's a dark and depressing show, but it's definitely smart in how it handles things, though it's certainly not for everyone ^^.
Also, I saw that you dropped Shinsekai Yori. I'm glad I'm not the only one who disliked it. Everyone seems to love it but I just...couldn't get into it. And looking over at your list again, our tastes are surprisingly similar o_o (with the obvious exception of S;G)