Do you emulate your friends?
If someone you perceive to be cool does or says something that you think looks or sounds really smooth, do you try it on for size?
Do you find yourself accidentally using phrases that someone you are around a fair bit uses?
You might not be a copy cat, per say, but do you adopt habits or behaviors based on observation?
Can you see people around you intentionally or unintentionally changing slightly because of a popular movie or TV character? Some men tend to quote movies all the time.