In Margaret, from In Watermelon Sugar, I thought it was interesting that the only thing to identify Margaret to the nameless narrator is the creaking of the board as she steps on it. Margaret is the only one that steps on it and it got me thinking about how one's gestures are deeply intertwined with one's identity. One can be recognized by their gestures just as much as anything else about a person, to the point that gestures become one's identity as with Margaret. At this point all we know about Margaret is that she steps on creaking boards. However, just this act causes the narrator to hide and not answer the door, speaking volumes to what a simple gesture can mean to people.
This is a deep contrast to the My Name section in In Watermelon Sugar, where the identity of the narrator remains elusive throughout the piece. I can't be too sure what he meant, but I think he is talking about how a name doesn't identify one's self and that a name is just a name and holds no value out of itself. I believe the narrator is suggesting that identity itself is more about the experiences that make up a person. This is supported by the fact that he compares his name to experiences of a variety of emotions and even daily life experiences like walking around in a field of flowers or describing the fire in a stove.