Signature strengths refer to those character strengths that are most essential to who we are. (acknowledgealliance.org)
There are 24 of these and it is possible to visit a web site and go through a 30 minute test that will give you a sense of your top signature strengths. (josephshaub.com)
When the job is a calling: The role of applying one's signature strengths at work. (positivepsychologynews.com)