Life is a process of growth and change. Little children and teens can often be observed trying on different behaviours and personalities as they seek to establish an identity. They determine what to keep by how well it suits them and by watching the reaction of peers and adults.
Adults do the same thing. Admit that you have mimicked a gesture, or practiced a certain lingo, or adopted a popular hair style or way of dressing.
The choices we make, and the reasons why, are as unique as our fingerprint. True confidence comes not from assuming the identity of another but from discovering and appreciating how we are similar to and different from others.