Freelancing requires a real hustler mentality and a whole lot of love for what you do. You want to look for a freelancer who's doing it because they want to work on projects they're passionate about or with people they enjoy working with.

Maybe a freelancer first started freelancing so they could be at home with a child or elderly parent, or so they could travel - that's fine too. If that's the case, make sure they explain why they stayed with it. If they fell in love with it for the work, freedom and flexibility, they're likely in it for the long haul.

What you don't want is someone who's freelancing because they don't like working with people or on teams. This is a sign that they might not be easiest to work with.