Even though the same pieces come up again and again, there is a considerable backlash against just such a concept. I am of the camp that a concert performer should know enough of the standards to satisfy a general audience. The people that may attend a concert one a year or less are better served by hearing the songs that help make the guitar popular in the first place. But the ultimate choice should be what the artist can play passionately, if a piece is stale to the performer then he shouldn't feel obliged to play it.
I think it has become acceptable to mix it up some. Have a repetoire that includes the major styles, eras and composers with a few hits mixed in and the concert should be fine. I personally have a hard time listening to a whole concert if there isn't at least one or two familiar pieces to really just enjoy.
That being said there ARE some songs that are just so central to what people think of when they think classical guitar that its ok to list them
I think these are songs that the general public would love to hear played. These aren't my personal favorites, just the generally accepted standards.
Leyenda- Asturius, is there any difference between these two, I never knew?
Recuerdos de Alhambra
Concierto de Aranjuez
Several works by Bach or Villa Lobos could be added to the list, its hard to choose one but hard to leave any out either.
Variations on a theme by Mozart
I don't know if the guitarist/ composers like Guiliani, Carcassi, Paganini or modern people like Brouwer make the list. Do any non-guitarists like or respect this music? Barrios is really popular right now but is that just amongst guitarists as well. Sor except for the Mozart variations is not really that popular either.