Sarah...or,uh, Lisa?

My sister called me the other day and we were just discussing things, such as how her baby is due Wednesday (I'm so excited) and names they were thinking of. I had discussed this with my sister many times, and she told me that they had finally decided on a name. She, however, didn't want me to tell anyone what they had decided because everyone wanted to offer their opinions on it, and she was tired of hearing someone say they didn't like the name. I like the name (they chose Bishop Samuel) because it's different, but I guess some of our family members have had strong oppositions to it. It makes me think of how much names really define someone. If I had been called anything but Lisa, would I be a different person? If my mom had named me something like Sarah, does that mean I would act more like a Sarah? I know every language has different words for things, and they're all the same (a rose by any other name would smell as sweet), but what about names for people? When names ever come up in discussion, people always say, "You look like a blank". How can you look like a name? I've actually heard Sarah for myself many times, and I just wonder, what is it about me that looks like a "Sarah"?? Is a Sarah a defining quality? How can you act like a name is my big question. If anyone has any views on this, feel free to respond!