In my case, there was vinyl LP lying around the house of John Zaradins Concerto D'Aranjuez, and five solo pieces on the B side (from memory, Ponce's Balleto - labelled as a Weiss piece, Lauros Waltz #3, Malats Spanish Serenade, can't recall the other two but one was baroque). I was I think around 16 years old
So, my parents played the concerto often - it was their album, but I was intrigued by the solo pieces too, so I ordered the Balleto sheet music (using a telephone and a postal order) and changed the strings on my brothers guitar (nylon) from left handed to right handed (he was away from home for a while otherwise he would have said 'no' as brothers often do). When the sheet music arrived, I found it thrilling to play bits of it and to know how it should sound. My hands had only played (and in this order) smoke on the water, stairway to heaven and a blues turnaround so I was rubbish, but the feeling of the pleasure of matching my hands to something which my ears had found so beautiful is what I still search for today (I pretty much always learn pieces which I have already fallen in love with by having listened to it many times).
I'm now 48 and I practice every day. I never play to other people and don't upload any of my recordings anywhere, it's a totally personal journey that I find consistently engaging and I love that fact that it exists separately from my other lives (work, love, family) and that there are absolutely no requirements placed on it, no deadlines, no pressure. This is how my motivation for this continues over the years - it's because there are no deliverables or requirements or judgements on it - it just always feels the same kind of great for that reason!
Hope this helps somehow
Freelance .NET Software Developer