Hi Carrie,
Thanks for visiting the Disney Parks Moms Panel. Congrats on your anniversary.
You'll find kids at all of the Walt Disney World hotels, but there are definitely lots of great options for couples staying without children. Depending on your plans, I'd probably recommend either the Grand Floridian or Disney's Yacht Club.
The Grand Floridian is the most upscale resort, and is home to some of the best restaurants on property. It's also on the monorail loop, and offers a fabulous spa.
Victoria & Albert's, a AAA 5-diamond restaurant, would be a great option for your anniversary and is located at the resort.
The Yacht Club would be a great choice if you plan to spend any time at the Boardwalk and/or want to dine in the World Showcase at Epcot. Both locations are easily walkable.
I hope that helps you make a decision. Happy anniversary and have a great vacation!