I love SF novels, and count stories like The Forever War and The Ghost Brigades among my all-time favorites, but in the last year, I've grown very fond of the SF short story. Since an SF short story is what I hope to scrape out of my brains as my next writing project, I've been reading as many short stories as I can get my hands on, in places like Subterranean online, the Subterranean magazine, and in various anthologies.
I recently finished a great anthology called the Nebula Awards Showcase 2007, edited by Mike Resnick. In addition to some great SF from established writers, it included some fantasy (Kelly Link's Magic for Beginners was wonderful), some poetry, and a novellette from Harlan Ellison that, while not SF or Fantasy, was probably my favorite tale in the book.
Now that I'm done with it, I'm looking for a new SF anthology. I've spent some time in the bookstore and on the googles trying to pick out a new one, but it's tricky. Most anthologies are, by their nature, uneven, and some are downright garbage. I haven't red enough to know if there's one editor who I can rely upon more than another, of if there's one publisher who puts out books with pretty covers and not much else.
While I wait for my sample issues of F&SF to arrive, I'm looking for a new anthology that's not huge (some are over 800 pages, which is just too big for me to schlep around town) that focuses on speculative fiction.