To be honest- it isn't really
this song that makes me reminisce. Simply piano music in general. My mother had this scheme when I was growing up, and we were all going to become famous musicians, my sisters and me. So she had me take lessons well into high-school. I was pretty good, and even now- just seeing a piano, let alone listening to one, makes me think of home, my family, and when I was a great deal younger.
It's a feeling of comfort.