Personalities are an easy way to manage different types, locations, or entities of businesses. For example, if a photographer shoots advertising during the week, and sells art prints on the weekend, he/she can keep the different businesses separate by using different personalities. Personalities are also a great way to manage multiple artists if you are an agent. Since a personality maintains its own item catalog, logo and preferences, it's easy to see how segmenting your types of jobs, or different locations where you conduct business, or managing different artists is a powerful feature.
Choosing the country in the personality window sets the currency for the jobs associated with that personality. The first time you started Blinkbid you created your initial personality.