I've read a few of these, not most. Liz Williams is generally a pretty entertaining read, especially if you like demons and dragons and a vaguely Chinese-afterlife-story flair. The Varley is good, but Kim Stanley Robinson does environmental change and Ice Age stories better. It's not Tiptree's best; get a short story collection. The Steele has some disgusting bits, which is a shame because I really like the Coyote stories when they were serialized. (This all of the cuff, and in need of fact-checking to make sure I haven't confused similar names or titles.)