Hit up the carriage ride at POR in the evening hours (around sunset), it's beautiful and romantic. Is there a specific thing you guys like at WDW that is a fave? For my DH and I, nothing beats dinner at Rose & Crown followed by Illuminations. It's our "thing."
Have you been to WDW before? What types of food do you both enjoy? Dinner at Boma's is yummy and follow that up with a night time stroll out to see the animals afterwards is another romantic thing to do.
Next Trip: Dec 2012 WDW with my parents