Yes, I have also gone through too many systems to remember. I went on a buying spree several years after I bought my first system. I put together a 4 channel system. It was very exciting but there were few 4 channel records available. I still remember one "Santana" 4 channel record that I played constantly. Then, I bought huge LWE speakers with separate components. The LWEs were able to go down to 20 Hz by adding a proprietary circuit into the amplifier. The LWE inventor and owner, Louis W. Erath, recently passed away but his speakers still have their followers. Those monsters needed a big room and plenty of high quality power. In those days, I was mostly into rock and the LWE speakers were perfect for that genre.
Of course, everything changed after I had to take an apartment and a more demanding job. With marriage and a kid, a stereo system wasn't my priority but I usually had something decent for high fidelity sound.
In college, my musical taste changed dramatically after I met some music students who were jazz fanatics. Living in a superb of NYC made it easy to hit the Manhattan jazz clubs. I still remember the experience of attending my first live jazz concert. I felt my hair stand on end as I listened to those great jazz composers and musicians. To myself, the experience of jazz improvisation was something bordering on the supernatural. I still say that there is nothing like listening to a great jazz group in a small club. But the scene changed over the years as many jazz artists moved to Europe. Over the last 20 years, some of the greatest, like Andrew Hill, have passed away.
The 20 year period from the early 50s to the early 70s was one of extraordinary jazz creativity and experimentation. With jazz aficionados like Rudy van Gelder, the time was ripe for a great period of artistic output in a uniquely American genre of music. It is now gratifying to see blogs like "London Jazz collector," whose members spend their time collecting and cataloguing some of the greatest jazz recordings.
For the first time in my life, I am completely satisfied with my current bedroom system. It consists of ModWright components and Harbeth 7ES-3 bookshelf speakers. I can't imagine ever selling my speakers. While not big enough to produce room shaking bass, they have a certain sweetness combined with accurate reproduction, and startling transient response. I realize that speaker sound is a very personal thing. But for my taste, the Harbeths are perfect.