Same, OP. Lifelong hardcore VGM fan, I listen to a bunch of different music but VGM is still my favorite and it's not even close. Also, your avatar is SO FUCKING COOL WHERE DID YOU GET IT
For me I think Mega Man 3's soundtrack was the first one I really took particular notice of, but I was too young at the time (like 6-7 years old) to really understand what that meant and I certainly didn't have any means at the time to hear Mega Man 3's music outside of playing the game.
It wasn't until I played Final Fantasy VI (which I knew as Final Fantasy III at the time) as a preteen that I was old enough to understand what it meant to have music really speak to me in a way nothing else could. Kefka's Domain -- the limited US release of FFVI's soundtrack -- then became the first CD album I ever spent allowance money on and from there, the rest is history. Suddenly I had been awakened to a whole universe of music I knew I had loved prior to playing FFVI, but could now quantify and really appreciate for the first time on a deeper level.