You may not be aware that there is a scale of seven deadly vices connected to social engineering. The deadliest social engineering attacks are the ones that have the highest success rates, often approaching 100%. What is the secret of these attacks, how come they succeed so well?
Your own observations show you that people are very different. Some are always enthusiastic and willing to learn something new. Others are more conservative but courteous to their co-workers. A bit further down this scale are people that always looks like they are bored with life and then at the bottom are those who just don’t care and basically are in apathy about everything.