How about on the beach at Ft Wilderness before, during, after the electric water pagent parade/fireworks at MK?
Or perhaps something with Fantasmic?
Or how about over dinner at the Cailfornia Grill in the Contempory Resort? They pipe in the music from the firework show at MK, as well as dim the lights. Sounds like something I would do.
I should proably preface this by saying that I'm not married, or engaged, nor have I ever been anywhere close, but I have been called a romantic from time to time. Ok, that's my 2 cents.