I started out with Pandora Hearts, but I only watched that show after my sister's friend introduced it to me in mid 2011. That was when I was 14.
I fell in love with the music almost immediately. It was the first time I was even bothered to look up who composed the soundtrack because it was that good. I particularly liked the Lacie theme, and I wanted the full version, and then Yuki Kajiura popped up. I then wanted to find who sang the OP, and then I found FictionJunction.
However, I didn't know the two were related and I only listened to the PH OST and Parallel Hearts. After that, I didn't delve further into Kajiura's music - not until Kara no Kyoukai.
That same friend of my sister's got me heavily interested in Fate/Stay Night, which then led me to become a super TYPE-Moon fanatic. With that, I started watching Kara no Kyoukai in late 2011, and while I did fall asleep in the middle of the movie, I woke up in time for the glorious fight scene with it's breathtaking animation (the best I've seen at that time, and now still being one of the best) and the music. The OST. It fit so perfectly with the atmosphere that it made me want to continue watching it despite the pacing issues and the non-chronological order (which I quickly got over once I watched the 3rd movie).
And then, once the movie ended, the ending theme played. I will never forget how I felt when I listed to oblivious for the first time. I was just...blown away. Words aren't enough to describe that feeling. It's unlike anything I've ever heard before in my life, and it made me just sit there in front of my TV just to soak in the sheer beauty of the song.
I then proceeded to marathon the whole KnK series in one sitting. Best decision ever. Kimi ga Hikari left me in tears. Kizuato made me smile a lot. ARIA was mesmerizing. sprinter was eargasms all around. fairytale was very soothing and just beautiful. And seventh heaven was the highlight of everything - the perfect song to end one of the best movie series I've watched - in both anime and live-action mediums.
The day after that, I immediately scrambled to download the whole OST. "Oh," I thought, "it's Yuki Kajiura again." And listening to the OST made me remember all those moments from KnK. And when I watched Kalafina's live performances, I was hooked. There was no going back.