Not unlike playing Debussey's "Reverie," playing "Claire de Lune" puts me in a trance. The steady motion and the nature of the chords and arpeggios are a recipe for dreamland, as far as I'm concerned.
I learned to play this piece when I was 16 or 17, and I suspect I was fairly good at the thing then. I used it to audition for a new teacher once, and she was very impressed. I was young then, and my brain could absorb new things without spitting them out like unexpected sour candy. Ever suck on a piece of candy you thought was solid sweetness only to discover the outer coating was a deceitful trick, and the inside was the worst of a lemon you had to spit out as fast as possible? I think the older brain spits out new tricks that way. So, at the tail end of my 40s, I can take in something I thought was solid sweetness—Claire de Lune—and then spit it out when I realize that I have misremembered a passage or tone so long that I don't even know the song anymore. It's a lemon.
Anyway, this is what Claire de Lune sounds like now, in my sour candy stage of life. It still inspires dreams, but don't expect me to learn it properly because I'll just spit it out.