It been 5 years since my last visit, so I hoping to go this year, maybe June. Rather then do an all day marathon, I planning break it up in 2 days. One half in the morning, rest at night the next . I would like some suggestion.
I love the riverboat at night, but if you are going during the summer it will most likely be closed at night for Fantasmic. I also like Splash Mountain at night if I know I'm going back to the hotel soon to dry off. Matterhorn is great too. Keep in mind, DL can be a little confusing at night with the fireworks and fantasmic crowds, and the fantasyland and toontown closures.
For DCA, Carsland is incredible at night. If you are only doing one night, you might want to check out World of Color instead. Tower of Terror is also fun at night.
Matterhorn at sunset!!! I suppose any ride that goes outdoors around sunset would be amazing! I love Splash Mountain on warm summer evenings as well. I am bummed that they close down Fantasyland though to prep for fireworks.
The Matterhorn especially if it's cold and foggy. Thunder Mountain, Jungle Cruise, and POTC and HM. I know a lot of people will be confused on the last two but I like the transition from outside to inside on POTC and HM when it's dark out.
over at DCA RsR, Screaming, and ToT. ToT because when the doors open the night looks better than the day IMO.