First-borns are natural leaders and often high achievers. The majority of politicians, spokespersons and managing directors are first-borns. They often come in two flavours: compliant nurturers and caregivers or agressive movers and shakers. Both are in control; they just use different methods. As a rule, first-borns are picky, precise people who tend to be punctual, organised and competent. The negatives are that they are often moody and occasionally lack sensitivity. They can be intimidating, particularly by pushing people too hard or refusing to take no for an answer. Sometimes they can be a bit 'know-it-all', and often they are poor at delegating, largely because they don't trust other people as much as they trust themselves. They also tend to be bossy, perfectionists and overly conscientious.

Last-borns are the world's cheerleaders. They have strong people skills and love to entertain and talk to others. They make friends easily and immediately make others feel at home. They're extroverts, energised by the presence of other people and probably not afraid to take risks. However, last-borns tend to get bored quickly. They have a strong fear of rejection and a short attention span. When the fun stops, they've had enough and want to check out. To some extent they're self-centred. They may harbour unrealistic expectations of finding a relationship that is always fun - and, of course, such relationships simply do not last.