Also add fan fiction, thrillers, historical novels, etc. Find your area of interest and dig into GA. There are over 50 terrific authors represented on this site (I restrain myself from shamelessly promoting my Jack Scribe stories). Fellow Hosted Author, Don Hanratty, has one of gay literature's classics - Working It Out - represented on his story page. And Topher Lydon's Carter series is a masterpiece.
By all means, check out The Best of Nifty link. I've read David Buffet's Alpha Male twice. And all of Michael Arram's stories are must read material. Another respository of talented authors is at www.awesomedude.com and home of the talented Graeme. Check out Heart of the Tree and Fall Creek Lessons.
Over at CRYboy - Tim Mead, Drew Hunt, Brew Maxwell, Draginacht and Sara Bell are just a few stars from this fantastic collection of authors.
I could go on and on...but you get the point. Research and enjoy!
P.S. I just noticed that this, appropriately, is my one thousandth posting