Interesting topic. I have no idea exactly which music got me into EDM, but here's a little story about how I got into it:
I used to listen to a lot of screamo and that kinda music, was really into it. One day a guy in my class (I didn't even like the guy) added a guy he knew on my Facebook (I knew his little sister though) and he randomly started talking to me. We made friends, and today that guy is my roommate. He listened a lot to dubstep (not Skrillex-type of thing), dnb, trance and house. I remember we talked about music and found out that despite what we mainly listened to, we had a lot in common. We started hanging out and smoking, and all the time we would listen to music and watch videos. This is how I got introduced to EDM.
We later applied for the same school on the other side of the country (Norway) and both got in, so we became roommates/classmates/basically brothers. At this school, we met a girl who we kinda already knew from a Norwegian forum pretty similar to Bluelight. Since we were from a little town, we knew next to nothing about the underground rave scene in Oslo, but she introduced us to it. We started going to warehouse raves with psy trance, and got to know some people who arrange these raves. Now we use to help them arrange them and stuff, and also started going to Holland to go to bigger events; in November 2012 we were at Qlimax, and in February we'll go to Hard Bass. After that little coincidence that introduced me to this world, I have so much I want to experience and so many festivals I want to go to.