If you were dividing up short stories, how would you want them divided? Thematically? Chronologically? Seasonally? (Winter, winter, winter, and not-winter, in my case.) By genre and/or sub-genre? By the thing that allowed for the cleverest titles or most apropos cover images? What else would you want to see here?
If this short story writer wrote stories in a series with one set of characters, in addition to all the other stuff she did, but there weren't enough of those for a collection yet, but there would almost certainly be at some point, would you want to see them dispersed, put in one collection, or left out? If instead of the reader you were the writer, would your answers be different?