I wish I had some cool story, but the truth is last September, I had just got Rock Band 2 for my 17th birthday. I already had Rock Band 1 and had downloaded Constant Motion (simply because it sounded hard to play on Expert guitar). I honestly thought the song sucked, but my friend kept asking me to play it because he liked to see me play (or should I say butcher?) the solo. He hated the song itself though (he was just starting to like metal).
Anyways, then I saw that this band had a song in RB2, so I started thinking to myself, "oh no here we go again," so I started to play Panic Attack. I actually kind of liked it. Even though I wasn't sold yet, I thought, "I have to look up these musicians, they play like crazy. I wonder if they can play live." I looked "Dream Theater Live" up on YouTube, and it was the Score (2nd disc) version of Another Day. I was blown away, but I thought I looked up the wrong band, because Another Day sounded nothing like Constant Motion.
Fast forward about two months, and I hadn't really researched them anymore. My friend was over and asked me to play Constant Motion again. I said, "Fine, but I swear I'm never playing this song again after this." I played it, and something clicked this time. I really was enjoying the song. I looked up Dream Theater again, looked up some of their other stuff and noticed that they had a song on Guitar Hero World Tour (I had it but hadn't unlocked the song yet). I played through the game and finally got to "Pull Me Under."
My life changed after I heard that song. I immediately ran out and chanced it: I bought all of their albums from Images and Words to Systematic Chaos (they were cheap at my local cd store). I sat down and spent a whole day just listening to the albums.
Fast forward another few months, and here I am, with all of their albums, dvds, and most of their Ytsejam releases. Whew, sorry I went on so long. But yeah, I have to thank Rock Band 2 and Guitar Hero World Tour for getting me into Dream Theater.