LOL - Brain Damage by Pink Floyd.... I've ever been one for the obscure... I think I impressed myself more than those I was playing the song to, who, of course, had never heard it...
I played King of the Road for a piano recital when I was about 9. That was a triumphant moment. Then I quit piano. Guitar was either Smoke On The Water or Eighteen.
The first song I learned to play was "Rain" by Status Quo. {I did once improvise "The House is rocking" by Cheap Trick on my sister's violin but that doesn't count}.
I had just bought a 4th hand bass and borrowed an amp and I plugged in and tuned it like a cello. I picked out the riff and the verses and it was a seismic moment when I made the chord change to the chorus.
It wasn't until 8 years later when I actually listened to the bass part that I realized that what I had learned to play wasn't the bass part at all, but a mixture of the lead and rhythm guitar. But it was a watershed moment because from the kick off, it defined my bass style which has always had a huge chunk of the melodic and improvisational. I never thought of the bass as simply part of the rhythm section or low end. Writing songs on bass was second nature from that first day because after I 'learned' "Rain", I wrote my first piece, "The virgin and the whore".
All in a nights work.
In my "free" bass lessons after finally getting my Coronet EB short scale copy bass out of lay-by i learnt the riff to Black Knight by Deep Purple because the "band" I bought the bass to play in wanted that one. It's still fun to play but the band passed on it - in fact the band didn't band together at all.
Mostly just the bits and pieces of songs in my lesson book, but I had been working on scales and stuff before I started lessons. At least my teacher was impressed, lol.