The psychology of unconscious/conscious mirroring/copying is facinating. It's used to empathize/relate or socially develope in general and can have positive or negative consequences depending on the source. You can pick up anything from mannerisms, accents and words to just trying things others have tried. Although some of us may like being unique/individual (I know I do), everyone mirrors to some degree whether it be conscious or unconscious. It's an integral part of social human interaction.