The Cars: ST (1978).
I'm ashamed to admit, I don't currently own a physical copy of this album. This was first introduced to me when I was 13 and my neighbor who was 17 at the time took me to the local music store. He bought this on cassette and played it while we he drove me around town. For a 13 year old it was the coolest afternoon and I'll always associate this album with that day (thanks, Andre). I bought this on cassette a few years later when I was 16, but my car stereo ate it and for some reason I never re-purchased it. In my opinion it is one of the top 3 debuts of all time.