I'd say the French expression je ne sais quoi somewhat applies here. It is a little hard to say what element of a ride makes it more appealing, in many ways, it varies from ride to ride. In some cases, nostalgia plays a role. In other cases, the ride has fun details/fun effects.Rode the Mummy once. Didn't see what the big deal was. Never rode again! Funny how that works.
Main reason I liked 1900 Park Fare, was the step sisters. The meal was way overpriced, and the food was always just so-so, but the step sisters were always a just a hoot. It must be very tiresome to be a princess all day.