It might be a horror to some, but imagine an all stars with all switchbacks. What switchbacks would be more entertaining?
As much as I would rage, complain via e-mail, and throw fire batons at the route creators for their lack of creativity, the Uruguay beef carrying task from TAR5 would be a memorable hit if only editing is better. I also found the Tomatina Festival Detour task from TAR10 quite unique and fun minus me wanting to strangle Kimberly's vocal cords.
TAR22's 2nd Switchback was both "Amazing Race-ly" insulting. Didn't remember families doing a spy task in TAR8 that well.