The old purple and blue version of this book - the purple was on the edge of the pages, the way some older books have velvety green sides - was my first introduction to the Golden Age of science fiction. The inventiveness and the creative audacity of these stories was always enough to overcome what I felt would have been a cripplingly antiquated "Gee golly" 1950s vernacular... except that the writing almost never has that black and white Leave it to Beaver sitcomish feel that, for some reason, was always attached to the Golden Age in my mind. Stylistically the collection is all over the place. The Connecticut Yankee anachronism of Roger Zelazny in "Lord of Light" is nowhere to be found in "A Rose for Ecclesiastices". Clarke's famous "The Nine Billion Names of God" isn't even a science fiction story until, basically, the last sentence. And describing anything written by Cordwainer Smith with "genre", "usual" or even "describable" is not applicable. I love this collection and, impossibly, every story in it - though some more than others.
I won't dwell on the weakest. Instead I'll highlight what I consider to be the best:
Sturgeon's "Microcosmic God" has the creepy, jealousy tinged atmosphere of nerds watching another nerd who is better at being a nerd than anyone else. This is what I would've been doing with my adolescent years if only mind and matter would've allowed, so reading it brings the distinct pleasure of reliving childhood fantasies. I'm also pretty sure it's the inspiration for a Simpsons Halloween episode involving Lisa and her tooth, which became a South Park nod to both the story and the Simpsons.
Asimov's "Nightfall" is rightly considered one of the best science fiction short stories ever. I've read the longer form and this is superior in pretty much every way: it's already one of the longer stories in this collection but it still benefits from the shorter form with its building stress and, yes, horror during the final pages. Many would disagree but I think "Nightfall" is one of the least creative stories in the collection in terms of sheer inventiveness. Despite that it's still incredible.
Cordwainer Smith is just amazing. As prosaic as that sounds it's about all I can say. "Scanners Live in Vain" is one of the weirdest stories in the collection and it might arguably be one of Smith's most "mundane". Reading a Smith story is like opening the pages of the Book of Revelations as interpreted by the grandson of cartoonist Gary Larson, the painter Francis Bacon, a very wise female clown and Joan of Arc - and you're on acid. This is all an endorsement, by the way.
James Blish's "Surface Tension" is as good an "adventure" story as you'll find here. It's got a fairly linear plot and isn't hard to follow. It isn't simplistic, per se, but it hasn't got the style of some of the other pieces in this collection. It's one of my sentimental favorites, though, for its ability to impart - at least somewhat - a finer sense of proportion than pretty much any description of the vastness of the universe, including Doug Adams'.
And, finally, my absolutely favorite: "Mimsy Were the Borogroves". I'm not doing to describe it. I'm going to simply agree with another commentator that purchasing this book is worth it if only for this one story.