Another spot where you get the "curve effect" is on Main Street in front of the EMporium. A couple of CMs have told us that for the nighttime parades, Main Steet is better since it is the beginning of the parade route, and the characters are highly interactive. By the end of the route, near Pecos Bills, many of them are just ready to get done.
We witnessed this on our past trip -- about three characters who should have been spread out, all kind of rushed past, not waving or saying anything, just looking at the "goal line." Also, the Chernabog float did not open at the end, so everyone from about LTT down just saw this big lump of a "mountain" pass by. We decided we'd stick with Main Street for the night parades after that.
However, the afternoon parades run in the opposite direction, starting in Frontierland and ending around the hub at Main Street.