All the stories are good, some are excellent and aesthetically beautiful. Most of them read more like mainstream literature in its speculative phase, rather than outright SF, and are unsatisfying for the same reasons (inconclusiveness, lack of clarity in action, dystopic premise of what matters in life - YMMV).
Rating is for some graphic sexual episodes (unnecessary, IMO).
I especially liked: Counterfactual, The Hanging Curve, When the Great Days Came, The Peacemaker, A Special Kind of Morning, Morning Child.
SPOILERS FOLLOW:
"Knight was a clone of "The Lady of the Tiger"; "Community" showed the lefts idea of religions tyranny, as usual not recognizing their own face in it; "Dinner Party" may have been inspired by the Kent State killings; "Dream at Noonday" was a Vietnam-era story set as SF, in the vein of "All Quiet on the Western Front," "Red Badge of Courage" etc., and "Morning Child" was an SF retro-war Armageddon story, but not milfic - the agemorphing was extremely well done; "Kingdom" was a psychotic Poe story (obviously).
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Very well written short stories. Some of the stories were very interesting and made you think a lot, while other were not that enjoyable. Glad to finally learn how to pronounce his name :) ( )

...As I mentioned earlier, I thought almost all of these stories were very well written from a technical point of view. They were very well paced in particular. Structured so as not to give the twist of the story away too early. The tone of most of them is very dark though, making When the Great Days Come a somewhat depressing read. That being said, I like the way in which Dozois delivers the punch of his stories. The endings are often ambiguous, yet fit the tales perfectly. They leave the reader to mull over the larger theme of the story, rather than the fate of the main character as often as not. Some readers may find his style a bit verbose at some points but that was not something that bothered me in any of these stories. When the Great Days Come is a great collection. It took me longer than I expected to make my way though it, but is was reading time well spent.

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