[bduerst]

Personality is certainly a legal deciding factor in hiring someone for a position in a company, especially in at-will employment states.

It is illegal for a company to not hire on undue reasons such as race, religion, political affiliations, etc., but you are entering into an employment relationship, and it is not unfair to understand more about the person you are paying to work with.

[eli_gottlieb]

The entire United States is at-will employment. Some states forbid "union shops", but nowhere in the USA will you receive a permanent contract like you would in Europe that stipulates you cannot be fired without reason.