While the statistics don't sound all that inviting and the structure of the runway not, well... optimal; I would gladly visit this airport. Nepal is towards the top of a long list of places I want to visit. Worlds scariest airport is a subjective thing though. I would be more afraid of human behavior than challenging terrain or rough runways. Meaning that as an American I would be scared in Iran, North Korea and other places where it's not exactly a boon to be from the "West".