I think in some cases interviwer wants appearence, no more. For example to work as shop assistant in record shops or in clothes shops for young people.
In general, if job is with people, I supose hi or she ask for comunication skills and appearence.
If it is to work alone I think interviwer could prefer experience and qualifications.
Personality is important in this last case. If a person is very sociable can suffer working alone.