I prefer It's A Small World. The perfect way to end a Disney day. The perfect example of Disney magic. With the exception of the fact that it's about as far from the exit as you can get. But so worth it!!
I find that Big Thunder Mountain Railroad and the Matterhorn Bobsleds are even cooler at night. Same with Pirates Of The Caribbean, since the inside looks like it's night, so when you're riding it at night, you REALLY feel like you're outside taking a boat ride thorugh the Caribbean.