Just being at WDW w/o kids is romantic. Stroll around World Showcase, after Illuminations. The park is empty, the CM's are extra nice, and the atmosphere is unforgettable. Sleep in, that's always great. The great part of going w/o kids is the ability to slow down and smell the roses, so to speak. You'll be there during the Flower and Garden show, so that should be easy to do. Enjoy some of the great restaurants at different resorts. Places you wouldn't normally take kids. We have found each park offers enjoyment for adults w/o kids. At MK, we love watching Belle's storytime. Sounds corny, but it's really fun to watch other people's children have fun here. We also like to eat here when it's not being used. At MGM, breakfast at the bakery is great, then take you time walking through One Man's Dream. Also explore New York Street and take silly pictures. For some reason, being silly with your spouse is a great way to spark romance. At Animal Kingdom, get there extra early to ride Kilamanjaro Safari; look for Devine; watch the bird show; and really explore the trails around the Tree of Life and in the Oasis. Finally, at Epcot. It's the best place for romance. Dinner in France, snacks in Italy, a boat ride in Norway. Epcot, taken slowly and enjoyed to it's fullest is what we love.
Other things to enjoy: Miniature golf, the different spas, golfing, an Illuminations cruise (or better yet, a cruise on the Breathless, that's on my list for May 2005, our 25th). A late night walk on the Boardwalk. Carriage ride at POR (Take the boat from DTD and make it extra special.) I could go on. As you can tell, we love WDW w/o kids. Our kids are grown now, but I wish we had found out how great it was years ago. Once a year romance at WDW is a great way to keep your relationship revved up all year long.