I love me some SF short stories, mainly because they're more easily digestible than novels sometimes. A few pages here and there, maybe thirty, and you're on to the next one.
While I especially love "Best of the year" anthologies, because you know the stories are going to be good (even if not all of them are to your taste), non-themed anthologies can be fun too.
Jonathan Strahan is becoming one of the go-to editors in the SF field. In addition to doing at least one "Best of" anthology every year, he is in his fourth year of collecting stories for the Eclipse anthologies. None of these collections have a theme, but they all have great writers in them.
Unfortunately, the stories in Eclipse 4 aren't nearly as good as they could be. The first three are extremely weak, and many of the others are forgettable. Thankfully, there are six excellent stories in the bunch, and even the forgettable ones are mostly worth reading once.
My review of the book is now up on Curled Up With a Good Book.
If you're an SF fan, you should definitely check the book out. Just be prepared to not like all of the stories in it.