I went for CotM and DXC, myself, those were the games that killed the most time for me in middle school and High school.
Circle of the moon, at the time, was one of the most difficult games I had ever played. I was actually proud of myself when I finally beat it, also, dat soundtrack.
DXC introduced me to Symphony of the night, since I didn't have the old psx growing up. Because I'm a sucker for Metroidvania, I felt unlocking it during Rondo of Blood as a 'buy one get one free' deal. And because they directly tied with each other, I was satisfied.