Hard to recall exactly what it was. My mother plays piano, her mother taught piano, my uncle was a professional musician and my great-grandfather (on my mom's side) was fiddle player so I guess it runs in the family. The first music I remember hearing was classical, especially, Tchaikovsky's Swan Lake and Sleeping Beauty. Like many others, my first instrument was piano. I took lessons until I was about 12 years old. At that time I mistakenly figured it wasn't cool to carry piano books to school so I could walk to my my lesson after (Oh well).
Anyway, I picked up a guitar for the first time when my mother brought home a "Roy Smeck" 6-string generic brand from the local department store (can't remember whether it was Sears or Eaton's). My older brother and I listened to a lot of Lightfoot, Dylan, Ian and Sylvia as well as the Beatles, Doors, Hendrix, etc. I managed to figure out some tunes and went from there, basically self-taught on guitar.
My favourite types of songs to play are blues and bluegrass and my favourite composer is Bach. I'm hoping my daughter will continue with the music in the family. She's learning fiddle, so I guess my great-grandfather would be smiling.