I bought my first CD on 8 May 1988, a little more than 32 years ago: Mozart's Mass in C Major K.317, performed by the Bavarian Radio Orchestra and Chorus under Eugen Jochum. I've bought a few more since then. And not all of them have gotten the love they deserve.
So, since I'm home anyway, I decided two weeks ago (on the 8th, no surprise) to listen to all of them again. After two weeks I've gotten up to #41, Beethoven's "Emperor" concerto, by the Vienna Philharmonic with director Hans Knappertsbusch and pianist Clifford Curzon. This immediately followed #40, the Beatles' Help!, and begins a string of classical CDs (Beethoven again, Brahms, Dvorak, Mozart, Debussy) before hitting a classic Simon & Garfunkel album (Bookends) at #47.
Listening to all of them in order really brings me back to high school and college. Early on, I concentrated on filling up my CD library with the essentials. So the early CDs bounce around the classical canon (Beethoven, Brahms, Haydn, Mozart) and the popular canon (The Beatles, Billy Joel, Simon & Garfunkel, Cat Stevens), and things really don't branch out until the early 1990s when friends started getting me into more modern stuff.
Keep in mind, I had vinyl and cassettes back home, so some of these purchases and gifts replaced the obsolete formats and also let me listen to them in my dorm, where I had a small CD boom box that could make mix tapes but no turntable or any other decent equipment. I also worked at the campus radio station, where I had access to just about anything I could think of. So the eclectic and somewhat narrow list of titles for my first hundred or so CDs wasn't all I listened to.
Now, 32 years later, I don't buy CDs much. In fact, a lot of the later titles in my "CD" library are actually purchased downloads and have no physical form at all beyond the array of magnetic particles on various hard drives and backup disks. Those are a long way off, however; I'm only up to October 1988.
Updates as the situation warrants.