I read HPMOR and thought "if this stuff (meaning rationality) actually works, it's powerful in a way that I haven't seen before." I remember thinking something like that at the time, but memory is fairly unreliable. I'll have to dig through old journals to see if I mentioned it anywhere.

The sequences also had the advantage of being written in an entertaining way. Beyond that, I'm not sure what makes me any different. I'd like to think I'm special or have some trait that makes me more prone to rationality, but that's purely self-serving. More likely it's luck-- reading it at the right time when I was in a headspace to absorb that kind of knowledge.